WTU Herbarium Specimen Label Data Generated from the WTU Herbarium Database October 1, 2021 at 10:12 am http://biology.burke.washington.edu/herbarium/collections/search.php

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Label Query: Genus = "Potamogeton" Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton illinoensis Morong RUSSIAN FEDERATION, SAKHALIN REGION: U.S.A., WASHINGTON, KING COUNTY: Sakhalin Island, central part; circa 10 kilometers north-northwest of Road to King Lake Bog, 2 miles from gravel road along road with Tymovskoye and 4 kilometers northwest of Voskressnovka, on west center vegetation. bank of Tym River. 47.39361°, -122.42361°; WGS 84, uncertainty: 10000 m., Source: Elev. 328 ft. GeoLocate, Georef'd by WTU Staff 50° 53' 30" N, 142° 38' 45" E In a swamp, shallow water; with Typha, 3 other Potamogeton sp., Mix of hay fields, Salix and Alnus stands, and water-filled ditches. Chara. Origin: Native. Rooted in shallow water in ditch; leaves all submerged. Phenology: Vegetative. Origin: Native. David Sutherland s.n. 22 Jul 1965 Ben Legler 1033 30 Jul 2003 WTU-222658 Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton natans L. U.S.A., WASHINGTON, LEWIS COUNTY: Road between Packwood and Ashford, 13 mi from Packwood. RUSSIAN FEDERATION, SAKHALIN REGION: 46.60667°, -121.66944°; WGS 84, uncertainty: 10000 m., Source: Sakhalin Island, central part; circa 10 kilometers north-northwest of GeoLocate, Georef'd by WTU Staff Tymovskoye and 4 kilometers northwest of Voskressnovka, on west In water 1 ft deep in pond. Origin: Native. bank of Tym River. Elev. 328 ft. Richard Spellenberg s.n. 24 Jul 1965 50° 53' 30" N, 142° 38' 45" E with David Sutherland Mix of hay fields, Salix and Alnus stands, and water-filled ditches. Rooted in water in ditch; leaves floating. Phenology: Flowers. Origin: WTU-224410 Native. Ben Legler 1034 30 Jul 2003 Potamogetonaceae Herbarium: WTU Potamogeton alpinus Balbis U.S.A., WASHINGTON, WHATCOM COUNTY: Potamogetonaceae Concrete, ca 13.5 miles north-northeast. Baker Lake. Elev. 720 ft. Potamogeton alpinus Balbis T37N R9E S5; WGS 84, uncertainty: 6000 m., Source: Nat. Geog. TOPO!, Georef'd by John Bassett RUSSIAN FEDERATION, SAKHALIN REGION: Clustered submersed plants in 9-12 dm water, in small, Sakhalin Island, central part; 10.5 kilometers southwest of Nogliki on muddy-bottomed inlet of lake. Growing with P. berchtoldii. Only fruits east side of lower Tym River circa 1 kilometer upstream of mouth of emergent. Phenology: Fruits. Origin: Native. Parkata River. Elev. 66 ft. Ralph Naas 5596 3 Aug 1990 51° 38' 59.64" N, 142° 58' 37.98" E with Dorothy Naas Wet open meadow/hay field along river, with dense grasses, sedges, herbs; some standing water. Stems short, growing in shallow water WTU-318578 of slow moving stream. Phenology: Fruits. Origin: Native. Ben Legler 1063 2 Aug 2003 Potamogetonaceae WTU-358950 Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, CLALLAM COUNTY: Potamogetonaceae Lake Southerland near Lake Crescent. 48.09472°, -123.80583°; WGS 84, uncertainty: 10000 m., Source: Potamogeton epihydrus Raf. GeoLocate, Georef'd by WTU Staff Aquatic. Origin: Native. U.S.A., WASHINGTON, CHELAN COUNTY: North Cascades National Park Complex, Lake Chelan National W. H. Lawrence 319 22 Jul 1904 Recreation Area, open water of McAlester Lake. Elev. 5486 ft. WTU-96185 48° 25.785' N, 120° 40.46' W; UTM Zone 10, 672038.429E, 5366460.852N; Source: GPS, UTM calculated from Lat-Lon. Growing in circa 0.5 m. water with Equisetum fluviatile. Leaves Potamogetonaceae brownish-green. Phenology: Vegetative. Origin: Native. Potamogeton amplifolius Tuck. Sarah Gage 7628 8 Aug 2004 with Jim Duemmel, Steve Karafit, Gene Myers U.S.A., WASHINGTON, ISLAND COUNTY: Cranberry Lake, Deception Pass St. Park. WTU-361912, NPS accession 656, catalog 12478 48.14389°, -122.49111°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Origin: Native. Harold W. Smith 860 5 Jun 1936 WTU-38899 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, JEFFERSON COUNTY: U.S.A., WASHINGTON, KING COUNTY: Lake Leland. Near Duvall. 47.89194°, -122.88528°; WGS 84, uncertainty: 10000 m., Source: 47.74173°, -121.98207°; WGS 84, uncertainty: 2500 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Origin: Native. I. C. Otis 1768 20 Aug 1933 W. J. Eyerdam s.n. 10 Aug 1936 WTU-245558 WTU-351139

Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, PIERCE COUNTY: U.S.A., WASHINGTON, SKAMANIA COUNTY: Small lake 25 miles south of Tacoma, on highway to Mount Rainer. Gifford Pinchot National Forest, Thornton P. Munger Research 46.891172°, -122.44306°; WGS 84, uncertainty: 1000 m., Source: Natural Area. GeoLocate, Georef'd by WTU Staff Elev. 1100 ft. Origin: Native. T4N R7E S21 NE 1/2; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler J. William Thompson 8620 28 Jun 1932 Very wet areas along edge of beaver pond. Infrequent . Origin: Native. WTU-24554JWT Lois M. Kemp 7988 2 Jul 1979 Potamogetonaceae WTU-280653 Potamogeton amplifolius Tuck. Potamogetonaceae U.S.A., WASHINGTON, SKAGIT COUNTY: Potamogeton amplifolius Tuck. 2 miles easterly, south side of Skagit River, Barnaby Slough. 48.480957°, -122.254233°; WGS 84, uncertainty: 10000 m., U.S.A., WASHINGTON, THURSTON COUNTY: Source: GeoLocate, Georef'd by WTU Staff Summit Lake. Slow moving water. Origin: Native. 47.05333°, -123.12167°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Naas 1365 29 May 1972 Origin: Native. with Cheney Trevor Kincaid s.n. 21 Jul 1934 WTU-327211 WTU-349011 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, SAN JUAN COUNTY: Killebrew Lake, Orcas Island, ca. 1.5 mile east of ferry landing. U.S.A., WASHINGTON, WHATCOM COUNTY: Elev. 200 ft. Squalicum Lake. 48.603889°, -122.915°; NAD 27, uncertainty: 100 m., Source: 48.79778°, -122.34889°; WGS 84, uncertainty: 10000 m., Source: Georeferenced, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Shallow water at east end of lake. With Potamogeton richardsonii Origin: Native. and Myriophyllum; fairly common. Origin: Native. W. C. Muenscher 10158 6 Jul 1939 Scott R. Atkinson 446 18 Aug 1992 WTU-55321 WTU-325121 Potamogetonaceae Potamogetonaceae Potamogeton illinoensis Morong Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, SPOKANE COUNTY: Lake Crescent. Strickland Lake, a finger of Alkali Lake, 3 miles northwest of Amber. 48.059722°, -123.796389°; NAD 27, uncertainty: 5000 m., Source: 47.382638°, -117.755884°; WGS 84, uncertainty: 1000 m., Georeferenced, Georef'd by WTU Staff Source: GeoLocate, Georef'd by WTU Staff Origin: Native. Origin: Native. George Neville Jones 3511 Jul 1931 C. F. Yocum s.n. 20 Jul 1948 WTU-21764 WTU-132698 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, GRANT COUNTY: U.S.A., WASHINGTON, CLALLAM COUNTY: Evergreen Lake. Collected from a cove along the south shore. Along outlet of Lake Ozette. T19N R23E S23; NAD 27, uncertainty: 805 m., Source: TRS2LL, 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Georef'd by Ben Legler GeoLocate, Georef'd by WTU Staff 1 meter deep, organic sediment. Part of a diverse community of Growing in about 1 ft. of water. Plant decidedly reddish. Origin: pondweeds, Myriophyllum and Elodea canadensis. Origin: Native. Introduced. C. L. Hitchcock 24090 24 Jul 1965 J. Parsons s.n. 27 Jun 1994 WTU-223988 WTU-333643 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, KITTITAS COUNTY: U.S.A., WASHINGTON, COWLITZ COUNTY: In still pool along side of Yakima River in Yakima River Canyon Silver Lake. about 2.5 miles S of Thrall. 46.29583°, -122.7825°; WGS 84, uncertainty: 4567 m., Source: 46.962929°, -120.549697°; WGS 84, uncertainty: 1000 m., GeoLocate, Georef'd by Maria Yousoufian Source: GeoLocate, Georef'd by WTU Staff Origin: Native. In muddy sand. Margins of leaves undulate. Origin: Introduced. I. C. Otis 1765 16 Aug 1933 R. Spellenberg 1471 19 Jun 1966 with M. Spellenberg WTU-25474 WTU-229813 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton crispus L. U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: In pool near sea beach, Ocean City. U.S.A., WASHINGTON, KING COUNTY: 47.07111°, -124.16472°; WGS 84, uncertainty: 10000 m., Source: South of western approach to Evergreen Pt. Bridge on Lake GeoLocate, Georef'd by WTU Staff Washington. Origin: Native. 47.73556°, -122.33556°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff George Neville Jones 3889 23 Jun 1933 Among Typha at edge of lake. Origin: Introduced. WTU-101754 David Sutherland 1092 18 Jul 1965 with Don Simpson Potamogetonaceae WTU-224005 Potamogeton epihydrus Raf. Potamogetonaceae U.S.A., WASHINGTON, KING COUNTY: NW shore of Union Bay, Lake Washington, Seattle. Potamogeton crispus L. Elev. 15 ft. T25N R4E S16 SE; NAD 27, uncertainty: 805 m., Source: U.S.A., WASHINGTON, PIERCE COUNTY: TRS2LL, Georef'd by Ben Legler Ohop Lake, north end of Eatonville at fishing area at south end of Growing with Potamogeton crispus, P. pusillus, P. pectinatus, P. lake, in gently flowing outlet in ca 18" of water. richardsonii, Vallisneria, Myriophyllum spicatum, Najas, Elodea. 46.8675°, -122.26528°; WGS 84, uncertainty: 10000 m., Source: Uncommon aquatic. Origin: Native. GeoLocate, Georef'd by WTU Staff Origin: Introduced. P. F. Zika 14140 27 Aug 1999 with A. L. Jacobsen Richard Spellenberg 1216 24 Jul 1965 with David Sutherland WTU-342052 WTU-224369 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton crispus L. U.S.A., WASHINGTON, PIERCE COUNTY: Chop Lake, N of Eatonville at fishing area at S end of lake. U.S.A., WASHINGTON, YAKIMA COUNTY: 46.8675°, -122.26528°; WGS 84, uncertainty: 10000 m., Source: (Yakima Indian Reservation) Upper Sunnyside Diversion Dam, GeoLocate, Georef'd by WTU Staff Yakima River near Parker. In ca. 3-4 feet of water, with Elodea. Lower portion of stem bearing Elev. 705 ft. short branches with linear leaves. Origin: Native. 46.499849°, -120.450018°; WGS 84, uncertainty: 5000 m., Source: GeoLocate, Georef'd by WTU Staff Richard Spellenberg 1217 24 Jun 1965 Upper sonoran in water, river bed. Origin: Introduced. with David Sutherland E. Hunn 96 19 Oct 1976 WTU-224374 WTU-270977 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton fibrillosus Fernald U.S.A., WASHINGTON, MASON COUNTY: U.S.A., WASHINGTON, WAHKIAKUM COUNTY: Simpson Lake. Eastern margin of Grays Bay on Columbia River. 47.13348°, -123.33929°; WGS 84, uncertainty: 1000 m., Source: T9N R8W S9; NAD 27, uncertainty: 805 m., Source: TRS2LL, GeoLocate, Georef'd by WTU Staff Georef'd by Ben Legler In 3 ft. of water. Origin: Native. Freshwater intertidal mud; plant found at low tide in mud; other Potamogetons in vicinity. Origin: Native. Phillips B. Freer 336 9 Jul 1950 Cathy L. Maxwell 841 17 Aug 1985 WTU-135176 WTU-312895 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton foliosus Raf. U.S.A., WASHINGTON, SKAGIT COUNTY: Southeast end of Summer Lake on Lake Cavanaugh Road. In water U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: 2-3' deep at edge of lake. Lake Quinault. T33N R5E S21; NAD 27, uncertainty: 805 m., Source: TRS2LL, 47.46722°, -123.84417°; WGS 84, uncertainty: 10000 m., Source: Georef'd by Ben Legler GeoLocate, Georef'd by WTU Staff Origin: Native. Origin: Native. M. Arnot 673 24 Aug 1993 Trevor Kincaid s.n. 29 Jul 1934 WTU-327973 WTU-25277

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton foliosus Raf. U.S.A., WASHINGTON, SNOHOMISH COUNTY: U.S.A., WASHINGTON, GRANT COUNTY: Sultan, 2 miles NNW. Southwest of Moses Lake. 47.86278°, -121.81528°; WGS 84, uncertainty: 10000 m., Source: Elev. 1000-1150 ft. GeoLocate, Georef'd by WTU Staff 47.08028°, -119.33306°; WGS 84, uncertainty: 10000 m., Source: Shallow pond with muddy bottom. Top leaves floating, others GeoLocate, Georef'd by WTU Staff immersed. Origin: Native. Dry sand, moist dune hollow. Origin: Native. R. Naas 2009 20 Aug 1972 Harold St. John 4960 25 Jun 1921 with D. Naas with W. D. Courtney, Charles S. Parker WTU-327212 WTU-112829

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton foliosus Raf. U.S.A., WASHINGTON, WHATCOM COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: Wiser Lake Rd., pond at S end of Woodland Cenetery, at junction of Conconully Lake. Growing in the east arm of the lake, 2 meters road and Wiser Lake Rd. and Paradise Rd. deep. 48.90389°, -122.48°; WGS 84, uncertainty: 10000 m., Source: T35N R25E S6; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Macrophyte community dominated by Myriophyllum sp. And Potamogeton illinoensis. Origin: Native. David Sutherland 1071 15 Jul 1965 J. Parsons s.n. 25 Jul 1994 WTU-224001 WTU-333644 Potamogetonaceae Potamogetonaceae Potamogeton fibrillosus Fernald Potamogeton foliosus Raf. U.S.A., WASHINGTON, PIERCE COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: Massed and submerged in outlet of Spanaway Lake near Tacoma. Pass Lake, Deception Pass State Park, Fidalgo Island. 47.25306°, -122.44306°; WGS 84, uncertainty: 5000 m., Source: 48.40583°, -122.645°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Submerged in 1-2 feet of water. Origin: Native. J. William Thompson 9657 4 Aug 1933 Harold W. Smith 1496 3 Aug 1936 WTU-24575JWT WTU-38898 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton gramineus L. U.S.A., WASHINGTON, SKAMANIA COUNTY: U.S.A., WASHINGTON, DOUGLAS COUNTY: South side of Spirit Lake, Mt. St. Helens. 6 miles E of Delrio, Potholes. 46.27333°, -122.13389°; WGS 84, uncertainty: 10000 m., Source: 48.00553°, -119.29927°; WGS 84, uncertainty: 9750 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Origin: Native. Jon Titus s.n. 11 Sep 1994 C. F. Yocom s.n. 21 Jul 1949 WTU-334634 WTU-183930

Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton gramineus L. U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: North shore of unnamed pond on west side of Mount Dallas, West Deception Pass St Pk, Fidalgo Island. Side Road, San Juan Island. 48.42029°, -122.63999°; WGS 84, uncertainty: 1800 m., Source: Elev. 260 ft. GeoLocate, Georef'd by WTU Staff T35N R4W S13 SW; WGS 84, uncertainty: 400 m., Source: Origin: Native. Georeferenced, Georef'd by WTU Staff With Polygonum amphibium, Potamogeton natans, Lemna minor. Harold W. Smith 1649 13 Aug 1936 Aquatic. Origin: Native. WTU-38901 P. F. Zika 14073 14 Aug 1999 WTU-341998 Potamogetonaceae Potamogeton gramineus L. Potamogetonaceae U.S.A., WASHINGTON, KLICKITAT COUNTY: Potamogeton friesii Rupr. Falcon Valley. 45.977122°, -121.306515°; WGS 84, uncertainty: 8021 m., U.S.A., WASHINGTON, OKANOGAN COUNTY: Source: Digital Map, Georef'd by Sara Legler Bonaparte Lake, Colville National Forest. Origin: Native. Elev. 3700 ft. 48.79333°, -119.06°; WGS 84, uncertainty: 1600 m., Source: Wilhelm N. Suksdorf s.n. 17 Jul 1896 GeoLocate, Georef'd by WTU Staff Shallow margin. Origin: Native. WTU-117873 Harold St. John 5298 8 Jul 1921 with W. D. Courtney, Charles S. Parker Potamogetonaceae WTU-88654 Potamogeton gramineus L. U.S.A., WASHINGTON, KING COUNTY: Potamogetonaceae Mt . Baker Park, Lake Washington, Seattle. Elev. 13 ft. Potamogeton gramineus L. T24N R4E S10; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler U.S.A., WASHINGTON, CLALLAM COUNTY: On gravel shore with P. pectinatus, P. pusillus, P. crispus, P. North shore of Lake Ozette, 2 miles E of outlet. richardsonii. Vallisneria. Aquatic cast up on gravel shore. Origin: 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Native. GeoLocate, Georef'd by WTU Staff Origin: Native. P. F. Zika 14079 15 Aug 1999 C. L. Hitchcock 24071 27 Jul 1965 WTU-342051 with R. Spellenberg, D. Sutherland WTU-223381 Potamogetonaceae Potamogeton gramineus L. Potamogetonaceae U.S.A., WASHINGTON, OKANOGAN COUNTY: Potamogeton gramineus L. 5 miles W of Omak Lake. 48.411059°, -119.635406°; WGS 84, uncertainty: 1000 m., U.S.A., WASHINGTON, CHELAN COUNTY: Source: GeoLocate, Georef'd by WTU Staff Camas Land, Wenatchee Mtns. Origin: Native. Elev. 3000 ft. 47.472222°, -120.576111°; NAD 27, uncertainty: 1000 m., Source: C. F. Yocom s.n. 27 Jul 1949 Georeferenced, Georef'd by WTU Staff Small pond. Origin: Native. WTU-183929 J. William Thompson 11768 20 Jun 1935 WTU-15807JWT Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton gramineus L. U.S.A., WASHINGTON, PEND OREILLE COUNTY: U.S.A., WASHINGTON, WHATCOM COUNTY: 6 miles north of Newport. Ross Lake area, Hozomeen Ranger Station ca. 2.75 mi. SSE. 48.270169°, -117.04194°; WGS 84, uncertainty: 1000 m., Source: Elev. 2825 ft. GeoLocate, Georef'd by WTU Staff 48.9975°, -121.06361°; WGS 84, uncertainty: 10000 m., Source: In slow-moving water at edge of river. Origin: Native. GeoLocate, Georef'd by WTU Staff Scattered, submerged; rooted on rocky, muddy lake bottom. Only G. N. Jones 5659 24 Jul 1934 plant present. Origin: Native. WTU-29011 Ralph Nass 5188 27 Jul 1986 with Dorothy Nass Potamogetonaceae WTU-317244 Potamogeton gramineus L. Potamogetonaceae U.S.A., WASHINGTON, PIERCE COUNTY: Fort Lewis. Potamogeton illinoensis Morong 47.1349°, -122.48263°; WGS 84, uncertainty: 2900 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, KING COUNTY: In a lake. Origin: Native. Lake Sawyer. 47.33611°, -122.045°; WGS 84, uncertainty: 10000 m., Source: W. J. Eyerdam s.n. 4 Aug 1936 GeoLocate, Georef'd by WTU Staff Leaves falcate, but flat. Origin: Native. WTU-35206 Mrs. James Jennings s.n. 14 Jul 1965 Potamogetonaceae WTU-224629 Potamogeton gramineus L. Potamogetonaceae U.S.A., WASHINGTON, SKAGIT COUNTY: Pass Lake, Deception Pass Park, Fidalgo Island. Potamogeton illinoensis Morong 48.40583°, -122.645°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, OKANOGAN COUNTY: Origin: Native. Conconully Lake ca .5 mi NE of Conconully. Elev. 2320 ft. Harold W. Smith 1649 13 Aug 1936 T35N R25E S6; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff WTU-221512 Abundant, floating & partially submerged in steeply sloping, gravelly-sandy-silty bottomed lake. Stems evidently over 1 m long. Near center of section 6. Origin: Native. Potamogetonaceae R. Naas 5556 18 Sep 1989 Potamogeton gramineus L. with D. Naas U.S.A., WASHINGTON, SAN JUAN COUNTY: WTU-317264 NE shore of Big Twin Lake, Orcas Island. Elev. 1120 ft. T37N R1W S21; WGS 84, uncertainty: 10000 m., Source: Potamogetonaceae GeoLocate, Georef'd by WTU Staff Foliage green, common, with Potamogeton amplifolius, in 4 ft of Potamogeton illinoensis Morong water. Origin: Native. U.S.A., WASHINGTON, SPOKANE COUNTY: P. F. Zika 14150 28 Aug 1999 Meadow Lake. 47.7675°, -117.35389°; WGS 84, uncertainty: 1000 m., Source: WTU-342056 GeoLocate, Georef'd by WTU Staff Origin: Native. Potamogetonaceae T. Kincaid s.n. 29 Aug 1935 Potamogeton gramineus L. WTU-34805 U.S.A., WASHINGTON, YAKIMA COUNTY: (YIN) Status Pumping Pond about 7 mi SE Toppenish. Potamogetonaceae Elev. 215 m. 46.305792°, -120.203629°; WGS 84, uncertainty: 500 m., Source: Potamogeton illinoensis Morong GeoLocate, Georef'd by WTU Staff Upper sonoran pond edge. Origin: Native. U.S.A., WASHINGTON, SAN JUAN COUNTY: Cascade Lake, Orcas Island. E. Hunn 510 26 Jun 1977 Elev. 346 ft. T37N R1W S31; WGS 84, uncertainty: 800 m., Source: WTU-271156 Georeferenced, Georef'd by WTU Staff Foliage green, stipules brown, with P. amplifolius, P. zosteriformis, in lagoon. Origin: Native. P. F. Zika 14152 28 Aug 1999 WTU-342012 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, PIERCE COUNTY: Lake Ozette. Iron Mountain, Mount Rainier National Park. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: 46.79333°, -121.8275°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Shallow margins of lake. Origin: Native. Rocky slope. Origin: Native. J. William Thompson 9422.5 13 Jul 1933 F. A. Warren 1591 24 Jul 1932 WTU-24559JWT WTU-24591

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON, COWLITZ COUNTY: U.S.A., WASHINGTON, SKAMANIA COUNTY: Silver Lake. Spirit Lake, Mt. St. Helens. 46.29583°, -122.7825°; WGS 84, uncertainty: 4567 m., Source: 46.27333°, -122.13389°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by Maria Yousoufian GeoLocate, Georef'd by WTU Staff Shallow water. Origin: Native. Survey of blast zone of Mt St Helens. Origin: Native. H. St. John 7608 9 Aug 1925 Jon Titus s.n. 11 Sep 1994 WTU-89196 WTU-334450

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON, FERRY COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: North Twin Lake. Summit Lake, Mt. Constitution, Moran State Park, Orcas Island. 48.28728°, -118.38008°; WGS 84, uncertainty: 2000 m., Source: Roadside near Cold Spring trailhead. GeoLocate, Georef'd by WTU Staff Elev. 2000-2160 ft. Still water of lake. Leaves elliptic or sub-cordate at base, 3 to 10 cm. 48° 40' 15" N, 122° 50' W; T37N R1W S21/28/29; Source: long, spike dense, 3 to 5 cm. Long. Origin: Native. Specimen label Growing in water at lake edge. Leaves bronze colored. Sections Mai E. Dennis s.n. 10 Aug 1946 21/28/29. Origin: Native. WTU-111904 Sarah Gage G&R 440 4 Jul 1992 with Sharon Rodman Potamogetonaceae WTU-345448 Potamogeton natans L. Potamogetonaceae U.S.A., WASHINGTON, KLICKITAT COUNTY: Near Glenwood. Potamogeton natans L. 46.01889°, -121.28944°; WGS 84, uncertainty: 5000 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, WHATCOM COUNTY: In irrigation ditch. Origin: Native. Bellingham. 48.75972°, -122.48694°; WGS 84, uncertainty: 10000 m., Source: G. N. Jones 8574 21 Sep 1935 GeoLocate, Georef'd by WTU Staff In roadside ditch. Origin: Native. WTU-34650 T. C. Frye s.n. 10 Aug 1909 Potamogetonaceae WTU-101461 Potamogeton natans L. Potamogetonaceae U.S.A., WASHINGTON, KING COUNTY: Road to King Lake Bog, 2 miles from gravel road along road with Potamogeton natans L. center vegetation. 47.39361°, -122.42361°; WGS 84, uncertainty: 10000 m., Source: U.S.A., WASHINGTON, WHITMAN COUNTY: GeoLocate, Georef'd by WTU Staff Toolie Lake, 3 miles northwest of Ewan. In a swamp, shallow water; with Typha, 3 other Potamogeton sp., 47.147639°, -117.779015°; WGS 84, uncertainty: 1000 m., Chara. Origin: Native. Source: GeoLocate, Georef'd by WTU Staff Leaves floating; flowers and fruits above the water. Origin: Native. David Sutherland 1107 22 Jul 1965 F. L. Pickett 1603 7 Jun 1934 WTU-223998 with J. F. G. Clarke, L. A. Dillon WTU-66117 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton obtusifolius Mertens & W.D.J. Koch U.S.A., WASHINGTON, THURSTON COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: N side of Route 101, near Delphi Road. [locality and coordinates withheld; status in Washington: G5/S2 T18N R2W S18; WGS 84, uncertainty: 1000 m., Source: Nat. (Sensitive; WANHP)] Geog. TOPO!, Georef'd by John Bassett In 1 m of water. Apparently a 1st record for Washington. Origin: Aquatic, common in unnamed pond, with P. pusillus. Origin: Native. Native. P. F. Zika 14075 15 Aug 1999 G. W. Douglas 9402 13 Sep 1975 with G. G. Doulgas WTU-342050 WTU-281986 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton obtusifolius Mertens & W.D.J. Koch U.S.A., WASHINGTON, JEFFERSON COUNTY: Lake Leland. U.S.A., WASHINGTON, SAN JUAN COUNTY: 47.89194°, -122.88528°; WGS 84, uncertainty: 10000 m., Source: [locality and coordinates withheld; status in GeoLocate, Georef'd by WTU Staff Washington: G5/S2 (Sensitive; WANHP)] Origin: Native. Elev. 160 ft. In 3 ft of water, beyond fringe of Typha, with I. C. Otis 1769 20 Aug 1933 Utricularia vulgaris, Myriophyllum sibiricum, Spirodella. Common. Reference specimen for WTU-24578 illustration in Revision of Flora of the Pacific Northwest WTU Herbarium, 2016. Origin: Native. Potamogetonaceae P. F. Zika 14105 Potamogeton nodosus Poir. 21 Aug 1999 U.S.A., WASHINGTON, STEVENS COUNTY: Little Pend Oreille NWR; Long Lake. WTU-342117, WTU-V-025117 47.83722°, -117.83833°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Origin: Native. Potamogetonaceae C. F. Yocom s.n. 11 Aug 1949 Stuckenia pectinata (L.) Borner WTU-183927 U.S.A., WASHINGTON, ADAMS COUNTY: Harder ranch near Macall. 47.06083°, -118.01333°; WGS 84, uncertainty: 5000 m., Source: Potamogetonaceae GeoLocate, Georef'd by WTU Staff Origin: Native. Potamogeton nodosus Poir. C. F. Yocom s.n. 14 Jul 1948 U.S.A., WASHINGTON, WHATCOM COUNTY: Baker Lake. WTU-132697 48.72917°, -121.62778°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Origin: Native. Potamogetonaceae W. C. Muenscher 7632 5 Aug 1937 Stuckenia pectinata (L.) Borner WTU-55800 U.S.A., WASHINGTON, ISLAND COUNTY: Oak Harbor, 5 miles NNE, Dugualla Bay. Elev. 0 ft. Potamogetonaceae 48.3565°, -122.59715°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff Potamogeton obtusifolius Mertens & W.D.J. Koch Abundant submersed plant in seepage pond. Origin: Native. U.S.A., WASHINGTON, MASON COUNTY: R. Naas 3628 1 Sep 1977 [locality and coordinates withheld; status in Washington: G5/S2 with D. Naas (Sensitive; WANHP)] In shallows on east bank of lake, near inflow. Origin: Native. WTU-271691 Maribeth Gibbons s.n. 3 Oct 1991 WTU-321397 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, DOUGLAS COUNTY: U.S.A., WASHINGTON, SKAMANIA COUNTY: Rickard Lake, about 1 mile NE of Vista Point, Dry Falls State Park. South side of Spirit Lake, Mt. St. Helens. T25N R28E S31; NAD 27, uncertainty: 805 m., Source: TRS2LL, 46.27333°, -122.13389°; WGS 84, uncertainty: 10000 m., Source: Georef'd by Ben Legler GeoLocate, Georef'd by WTU Staff Origin: Native. Survey of blast zone of Mt St Helens. Origin: Native. Xerpha M. Gaines 689 5 Jun 1952 Jon Titus s.n. 11 Sep 1994 WTU-173700 WTU-334738

Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, GRANT COUNTY: U.S.A., WASHINGTON, SNOHOMISH COUNTY: Devil's Lake, Grand Coulee. 2.5 miles N of Stanwood. 47.94167°, -119.00222°; WGS 84, uncertainty: 10000 m., Source: 48.277573°, -122.36944°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. About 6 inches of water in ditch. Origin: Native. T. H. Scheffer s.n. 25 Aug 1945 R. G. Jeffrey s.n. 7 Jul 1947 WTU-102248 WTU-138549

Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, KLICKITAT COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: Bingen. Near Blanchard, Hwy 11. 45.71495°, -121.46462°; WGS 84, uncertainty: 500 m., Source: 48.59326°, -122.41598°; WGS 84, uncertainty: 500 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. In brackish water about 6" deep. Origin: Native. Wilhelm N. Suksdorf s.n. 14 Aug 1895 Richard Spellenberg 1224 6 Aug 1965 WTU-262288 WTU-223990

Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: Green Lake, Seattle. Turn Point, San Juan Island, along Turn Pt. Rd., N of public beach 47.681673°, -122.340866°; WGS 84, uncertainty: 1312 m., access, E side of road. Source: Digital Map, Georef'd by Maria Yousoufian 48.54111°, -123.08472°; WGS 84, uncertainty: 10000 m., Source: Muddy shores of lake. Origin: Native. GeoLocate, Georef'd by WTU Staff In shallow water, with Elodea densa and Utricularia vulgaris; J. William Thompson 9620 28 Jul 1933 infrequent. Origin: Native. WTU-24550JWT Scott R. Atkinson 430 15 Aug 1992 WTU-325596 Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogetonaceae U.S.A., WASHINGTON, OKANOGAN COUNTY: Stuckenia pectinata (L.) Borner Spectacle Lake. T38N R26E S2; WGS 84, uncertainty: 10000 m., Source: U.S.A., WASHINGTON, WHATCOM COUNTY: GeoLocate, Georef'd by WTU Staff Near mouth of Nooksack River, Marietta. Distributed throughout littoral zone. Organic sediment with rocky 48.82493°, -122.248493°; WGS 84, uncertainty: 10000 m., areas. Macrophyte community dominated by Elodea canadensis and Source: GeoLocate, Georef'd by WTU Staff Potamogeton illinoensis. Origin: Native. In slough. Origin: Native. J. Parsons s.n. 27 Jul 1994 W. C. Muenscher 9985 16 Jun 1939 with S. Levy WTU-55319 WTU-333645 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogeton praelongus Wulfen U.S.A., WASHINGTON, WHITMAN COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: 3 miles N of outlet of Rock Lake. Lake Erie. 47.227867°, -117.68111°; WGS 84, uncertainty: 5000 m., Source: 48.45279°, -122.6407°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff In pond. Origin: Native. In mud. Origin: Native. C. F. Yocom s.n. 19 Aug 1947 W. J. Eyerdam 1313 21 Aug 1937 WTU-132705 WTU-292474

Potamogetonaceae Potamogetonaceae Potamogeton praelongus Wulfen Potamogeton praelongus Wulfen U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: About 15 miles south of Sekiu. Near dock on W shore of Egg Lake, Egg Lake Road, San Juan 48.045405°, -124.3°; WGS 84, uncertainty: 1000 m., Source: Island. SW 1/4 of SW 1/4. GeoLocate, Georef'd by WTU Staff Elev. 160 ft. Origin: Native. T36N R3W S33 SW; WGS 84, uncertainty: 500 m., Source: GeoLocate, Georef'd by WTU Staff C. L. Hitchcock 24067 27 Jul 1965 Deep water, with Spirodella polyrhiza, Lemna minor, Lemna trisulca. Origin: Native. WTU-223932 P. F. Zika 14110 22 Aug 1999 Potamogetonaceae WTU-342111 Potamogeton praelongus Wulfen Potamogetonaceae U.S.A., WASHINGTON, ISLAND COUNTY: Cranberry Lake, Deception Pass St. Park. Potamogeton praelongus Wulfen 48.14389°, -122.49111°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, WHATCOM COUNTY: Origin: Native. Wiser Lake boat launching area east of the north end of the fill which crosses the lake. Harold W. Smith 859 5 Jun 1936 48.90389°, -122.48°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff WTU-38897 2 floating fragments. Origin: Native. David Sutherland 1082 15 Jul 1965 Potamogetonaceae WTU-223578 Potamogeton praelongus Wulfen U.S.A., WASHINGTON, JEFFERSON COUNTY: Potamogetonaceae Lake Leland. 47.89194°, -122.88528°; WGS 84, uncertainty: 10000 m., Source: Potamogeton pusillus L. GeoLocate, Georef'd by WTU Staff Origin: Native. U.S.A., WASHINGTON, PIERCE COUNTY: Ohop Lake, north end of Eatonville at fishing area at south end of I. C. Otis 1767 20 Aug 1933 lake. 46.8675°, -122.26528°; WGS 84, uncertainty: 10000 m., Source: WTU-28301 GeoLocate, Georef'd by WTU Staff In ca 5-7 ft of water, rooted in mud. Origin: Native. Potamogetonaceae Richard Spellenberg 1213 24 Jul 1965 with David Sutherland Potamogeton praelongus Wulfen WTU-223973 U.S.A., WASHINGTON, PIERCE COUNTY: Lake Rapjohn, north of Tacoma. 47.25306°, -122.44306°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Submerged. Origin: Native. Harold E. Helmrich 21 28 Jun 1932 WTU-306202 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton berchtoldii Fieber U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: Small pond just past the north end of Summer Lake. E 1/2 section. Near ocean beach near south line of Grays Harbor County. Elev. 522 ft. 46.95083°, -124.04972°; WGS 84, uncertainty: 10000 m., Source: T33N R5E S21; NAD 27, uncertainty: 805 m., Source: TRS2LL, GeoLocate, Georef'd by WTU Staff Georef'd by Ben Legler In slough near ocean beach. Origin: Native. Growing in water 12" deep in small pond. With some Spirodela polyrhiza. Sorrounding area of Typha latifolia, Juncus sp, Carex I. C. Otis 2116 19 Jul 1936 muricata & Spiraea douglasii. Origin: Native. WTU-51919 E. Burnett 396 7 Jul 1991 with M. Arnot Potamogetonaceae WTU-321555 Potamogeton berchtoldii Fieber Potamogetonaceae U.S.A., WASHINGTON, LEWIS COUNTY: 12 miles from Packwood on road from Packwood to Ashford. Potamogeton pusillus L. 46.60667°, -121.66944°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, KLICKITAT COUNTY: In ca. 2 ft of water. Origin: Native. Bingen. Ponds along Columbia River. 45.715°, -121.46333°; WGS 84, uncertainty: 10000 m., Source: Richard Spellenberg 1211 24 Jul 1965 GeoLocate, Georef'd by WTU Staff with David Sutherland Shallow ponds. Origin: Native. WTU-223972 Wilhelm N. Suksdorf 2570 1895 WTU-168856 Potamogetonaceae Potamogeton berchtoldii Fieber Potamogetonaceae U.S.A., WASHINGTON, KLICKITAT COUNTY: Potamogeton pusillus L. Bingen. Ponds along Columbia River. 45.715°, -121.46333°; WGS 84, uncertainty: 10000 m., Source: U.S.A., WASHINGTON, OKANOGAN COUNTY: GeoLocate, Georef'd by WTU Staff Leader Lake, 5 mile W of Okanogan. Shallow ponds. Origin: Native. 48.361339°, -119.691131°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff Wilhelm N. Suksdorf 2570 1895 Origin: Native. WTU-262301 C. F. Yocom s.n. 28 Jul 1949 WTU-183928 Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae U.S.A., WASHINGTON, KING COUNTY: Potamogeton pusillus L. Seattle, north of western approach to Evergreen Pt. Bridge, Lake Washington. U.S.A., WASHINGTON, SAN JUAN COUNTY: 47.73556°, -122.33556°; WGS 84, uncertainty: 10000 m., Source: NE shore of Sportsmans Lake, in small cove SE of boat ramp. NW GeoLocate, Georef'd by WTU Staff 1/4 of SE 1/4 section. In shallow water in mud at edge of lake. Origin: Native. Elev. 160 ft. T36N R3W S33 SE; WGS 84, uncertainty: 10000 m., Source: David Sutherland 1093 18 Jul 1965 GeoLocate, Georef'd by WTU Staff with Don Simpson Uncommon, beyond fringe of Typha, with Utricularia vulgaris, Myriophyllum sibiricum, Spirodella; In 3 ft of water. Origin: Native. WTU-224079 P. F. Zika 14106 21 Aug 1999 Potamogetonaceae WTU-341978 Potamogeton berchtoldii Fieber Potamogetonaceae U.S.A., WASHINGTON, SNOHOMISH COUNTY: Lake Thomas. Potamogeton berchtoldii Fieber 47.86828°, -122.18283°; WGS 84, uncertainty: 500 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, THURSTON COUNTY: Origin: Native. N side of Route 101, near Delphi Road. T18N R2W S18; WGS 84, uncertainty: 1000 m., Source: Nat. Trevor Kincaid s.n. 22 Aug 1934 Geog. TOPO!, Georef'd by John Bassett Aquatic, common in unnamed pond, with P. natans. Origin: Native. WTU-25281 P. F. Zika 14078 15 Aug 1999 WTU-341976 Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton berchtoldii Fieber U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: Big Lake. Bonaparte Lake, Colville National Forest. 48.40306°, -122.24°; WGS 84, uncertainty: 10000 m., Source: Elev. 3700 ft. GeoLocate, Georef'd by WTU Staff 48.79333°, -119.06°; WGS 84, uncertainty: 1600 m., Source: Origin: Native. GeoLocate, Georef'd by WTU Staff Shallow margin of lake. Origin: Native. Trevor Kincaid s.n. 18 Jul 1934 Harold St. John 5296 8 Jul 1921 WTU-25278 WTU-88653 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton berchtoldii Fieber U.S.A., WASHINGTON, SAN JUAN COUNTY: San Juan Island, Lakedale, about 2 mi WNW of Friday Harbor, along U.S.A., WASHINGTON, SKAMANIA COUNTY: Roche Harbor Rd.; approx. 100 yds. east of public Gifford Pinchot National Forest, Thornton P. Munger Research telephone/grocery. Natural Area. Elev. 50 ft. T4N R7E S21 NE; WGS 84, uncertainty: 4000 m., Source: Nat. 48.571944°, -123.084722°; NAD 27, uncertainty: 1000 m., Source: Geog. TOPO!, Georef'd by John Bassett Georeferenced, Georef'd by WTU Staff In beaver pond. Occasional. Origin: Native. Aquatic in 2-3 ft depths near dock, with Potamogeton natans and Typha; locally common plants with free-margined stipules. Origin: Lois M. Kemp 7989 2 Jul 1979 Native. WTU-285646 Scott R. Atkinson 220 17 Jun 1986 WTU-313862 Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton foliosus Raf. U.S.A., WASHINGTON, WHITMAN COUNTY: Toolie Lake, 3 miles northwest of Ewan. U.S.A., WASHINGTON, WHATCOM COUNTY: 47.147639°, -117.779015°; WGS 84, uncertainty: 1000 m., Baker Lake, ca 13.5 miles north-northeast Concrete. Source: GeoLocate, Georef'd by WTU Staff Elev. 720 ft. Submerged in water. Origin: Native. T37N R9E S5; WGS 84, uncertainty: 1500 m., Source: Nat. Geog. TOPO!, Georef'd by John Bassett F. L. Pickett 1604 7 Jun 1934 Clustered submersed plants in 9-12 dm water, in small, muddy-bottomed inlet of lake. Growing with P. alpinus. Phenology: WTU-66115 Flowers. Origin: Native. Ralph Naas 5597 3 Aug 1990 Potamogetonaceae with Dorothy Naas Potamogeton richardsonii (A. Benn.) Rydb. WTU-319058 U.S.A., WASHINGTON, CLALLAM COUNTY: Ozette Lake. Potamogetonaceae Elev. 25 ft. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Potamogeton foliosus Raf. GeoLocate, Georef'd by WTU Staff Leaves all alike, submerged spike emersed. Origin: Native. U.S.A., WASHINGTON, YAKIMA COUNTY: South end of south Wapato Road, 5 miles south of Wapato. I. C. Otis 1583 21 Aug 1927 46.375392°, -120.41917°; WGS 84, uncertainty: 500 m., Source: GeoLocate, Georef'd by WTU Staff WTU-24711 In irrigation ditch-stream. Plants in rapidly moving water about 6 inches deep. Stipules open down the abaxial side; glands inconspicuous. Origin: Native. Potamogetonaceae C. L. Hitchcock 24109 2 Sep 1965 Potamogeton richardsonii (A. Benn.) Rydb. WTU-224180 U.S.A., WASHINGTON, FERRY COUNTY: North Twin Lake. 48.28728°, -118.38008°; WGS 84, uncertainty: 2000 m., Source: GeoLocate, Georef'd by WTU Staff Sandy bed of lake. Leaves all submerged, broadly lanceolate, stipules splitting into filaments. Origin: Native. Mai E. Dennis s.n. 19 Aug 1946 WTU-111866 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, ISLAND COUNTY: U.S.A., WASHINGTON, WHITMAN COUNTY: Cranberry Lake, Deception Pass State Park, Whidbey Island. Big Cove, Cherry creek, 8 miles south of Ewan. 48.14389°, -122.49111°; WGS 84, uncertainty: 10000 m., Source: 47.02283°, -117.77093°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Origin: Native. Harold W. Smith 1541 10 Aug 1936 C. F. Yocom s.n. 13 Jul 1948 WTU-38902 WTU-132700

Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, LEWIS COUNTY: U.S.A., WASHINGTON, WHATCOM COUNTY: Walupt Lake, Cascade Mountains. Maple Falls, 3.25 mi. northerly. Silver Lake. Elev. 4000 ft. Elev. 755 ft. 46.4175°, -121.46139°; WGS 84, uncertainty: 10000 m., Source: T40N R6E S7; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Submerged. Origin: Native. Common submersed plant, occasionally fruiting stems emergent. In water of gravelly, sandy, silty bottomed lake. Most stems free J. William Thompson 15176 4 Aug 1940 floating, to 8 dm. Long. Leaves crispate. With other Potamogeton sp. Origin: Native. WTU-349014 Ralph Nass 5542 10 Aug 1989 with Dorothy Nass Potamogetonaceae WTU-316975 Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, KING COUNTY: Potamogetonaceae North end of Lake Washington. 47.75366°, -122.26139°; WGS 84, uncertainty: 2000 m., Source: Potamogeton natans L. GeoLocate, Georef'd by WTU Staff Origin: Native. U.S.A., WASHINGTON, FERRY COUNTY: Okanogan Valley: Swan Lake. I. C. Otis 2122 26 Jul 1936 T35N R32E S20; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler WTU-51926 Submerged at edge of lake by boat dock. Phenology: Vegetative. Origin: Native. Potamogetonaceae Alison Colwell 99-13 8 Jul 1999 Potamogeton richardsonii (A. Benn.) Rydb. WTU-349005 U.S.A., WASHINGTON, SKAGIT COUNTY: Lake Erie. Potamogetonaceae 48.45279°, -122.6407°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff Potamogeton gramineus L. Origin: Native. U.S.A., WASHINGTON, KING COUNTY: Trevor Kincaid s.n. 6 Sep 1934 Cascade Mts.;Twilight Lake. Elev. 3600 ft. WTU-349013 T21N R10E S5; WGS 84, uncertainty: 100 m., Source: Georeferenced, Georef'd by WTU Staff Wet meadows along northwestern edge of lake. In lake. Phenology: Potamogetonaceae Fruits. Origin: Native. Potamogeton richardsonii (A. Benn.) Rydb. Clayton J. Antieau 01-35 11 Aug 2001 with Katie Saurer, Mike Mazer U.S.A., WASHINGTON, THURSTON COUNTY: Lawrence Lake. WTU-350891 46.85259°, -122.57026°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff Origin: Native. Trevor Kincaid s.n. 24 Feb 1934 WTU-349012 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton gramineus L. U.S.A., WASHINGTON, KING COUNTY: RUSSIAN FEDERATION, SAKHALIN REGION: Cascade Mountains of Western Washington: Walsh Lake. Sakhalin Island; along west coast ca. 8 km north of Krasnogorsk, on Elev. 700 ft. west side of Lake Baklan'ye. T22N R7E S9 SW 1/4; NAD 27, uncertainty: 200 m., Source: Elev. 0 ft. Georeferenced, Georef'd by WTU Staff 48° 28' 12" N, 142° 4' 36" E Floating bog mat on east edge of wall found adjacent to Walsh Lake. Grassy marsh on edge of lake; with coastal dunes behind. In fruit; Other plants in vicinity: Drosera rotundifolia, Agrostis sp., Typha rooted in shallow water with both floating and submerged leaves. latifolia, Carex canescens, Potentilla palustris, Viola palustris. Phenology: Fruits. Origin: Native. Growing in 1/2 meter of water on north side of lake. Phenology: Fruits. Origin: Native. Ben Legler 806 21 Jul 2003 F. Weinmann 01-26 11 Aug 2001 WTU-357033 WTU-351311 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton gramineus L. U.S.A., WASHINGTON, OKANOGAN COUNTY: Okanogan National Forest. Roger Lake. U.S.A., WASHINGTON, KING COUNTY: Elev. 5960 ft. Cascade Mountains of Western Washington: Walsh Lake. 48° 38.949' N, 119° 58.042' W Elev. 700 ft. Expansive lakeshore wetland dominated by: Carex utriculata, other T22N R7E S9 SW 1/4; NAD 27, uncertainty: 200 m., Source: species including C. scopulorum, C. limosa, C. tenuiflora, Salix sp., Georeferenced, Georef'd by WTU Staff Potentilla fruiticosa, Potentilla palustris, Calamagrostis, Ledum Floating bog mat on east edge of wall found adjacent to Walsh Lake. glandulosum. Phenology: Flowers. Origin: Native. Other plants in vicinity: Drosera rotundifolia, Agrostis sp., Typha latifolia, Carex canescens, Potentilla palustris, Viola palustris. Alan C. Yen 03-095 26 Jul 2003 Growing in 1/2 meter of water on north side of lake. Phenology: with Sharon Rodman, Jessie Johanson, Joe Johanson, Suzanne Fruits. Origin: Native. Bagshaw, Richard Robohm, Ann Weinmann, Fred Weinmann F. Weinmann 01-27 11 Aug 2001 WTU-363315 WTU-351308 Potamogetonaceae Potamogetonaceae Potamogeton praelongus Wulfen Potamogeton robbinsii Oakes U.S.A., WASHINGTON, SAN JUAN COUNTY: In lake, 3.5 miles west of Friday Harbor. . U.S.A., WASHINGTON, KING COUNTY: 48.535255°, -123.081777°; WGS 84, uncertainty: 500 m., Source: Cascade Mountains of Western Washington: Walsh Lake. GeoLocate, Georef'd by WTU Staff Elev. 700 ft. Phenology: Vegetative. Origin: Native. T22N R7E S9 SW 1/4; NAD 27, uncertainty: 200 m., Source: Georeferenced, Georef'd by WTU Staff Morton E. Peck 13073 22 Jul 1923 Floating bog mat on east edge of wall found adjacent to Walsh Lake. Other plants in vicinity: Drosera rotundifolia, Agrostis sp., Typha WTU-24706JWT latifolia, Carex canescens, Potentilla palustris, Viola palustris. Growing in 1 meter of water near western shore of lake. Phenology: Fruits. Origin: Native. Potamogetonaceae F. Weinmann 01-15 11 Aug 2001 Potamogeton praelongus Wulfen WTU-351309 U.S.A., WASHINGTON, SAN JUAN COUNTY: Killebrew Lake, Orcas Island; along south edge of lake, approximately 1.5 miles east of the Orcas Ferry Landing. Potamogetonaceae 48.604722°, -122.900556°; WGS 84, uncertainty: 200 m., Source: Georeferenced, Georef'd by WTU Staff Potamogeton zosteriformis Fernald Growing on muddy bottom in four or more feet of water, with Myriophyllum sibiricim. Infrequent. [Mixed collection; filed under P. U.S.A., WASHINGTON, FERRY COUNTY: praelongus]. Phenology: Vegetative. Origin: Native. S. Twin Lake, 10 mi. SW of Inchelium. SW corner of NW bay. . T32N R35E S21 NW 1/4, NE 1/4; NAD 27, uncertainty: 805 m., Scott R. Atkinson 429 18 Aug 1992 Source: TRS2LL, Georef'd by Ben Legler Sample M, SW corner of NW bay, depth 3m. Assoc.: Elodea WTU-325598A canadensis, Potamogeton pectinatus, chara globularis. Colville Indian Reservation Aquatic Macrophytes. Origin: Native. Jonna Ahl s.n. 29 Jul 1983 with Judy Loescher, WTU-353907 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton pusillus L. U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: Killebrew Lake, Orcas Island; along south edge of lake, San Juan Island, Panorama Pond, 4.2 miles south of Friday Harbor approximately 1.5 miles east of the Orcas Ferry Landing. on Cattle Point Road. 48.604722°, -122.900556°; WGS 84, uncertainty: 200 m., Source: 48.474496°, -123.00528°; WGS 84, uncertainty: 500 m., Source: Georeferenced, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Growing on muddy bottom in four or more feet of water, with Frequent in pond. Flowering. Phenology: Flowers. Origin: Native. Myriophyllum sibiricim. Infrequent. [Mixed collection; filed under P. praelongus]. Phenology: Vegetative. Origin: Native. Melinda F. Denton 3556 3 Aug 1974 Scott R. Atkinson 429 18 Aug 1992 WTU-262237 WTU-325598B Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton praelongus Wulfen U.S.A., WASHINGTON, SAN JUAN COUNTY: In Trout Lake. U.S.A., WASHINGTON, SAN JUAN COUNTY: 48.532778°, -123.126389°; WGS 84, uncertainty: 800 m., Source: San Juan Island; Roche Harbor Road. Georeferenced, Georef'd by WTU Staff Elev. 210 ft. Phenology: Fertile. Origin: Native. T36N R3W S33 NW ; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Morton E. Peck 13068 22 Jul 1923 With Equisetum fluviatile, Potamogeton natans. . Common, deep water. Phenology: Vegetative. Origin: Native. WTU-24705JWT P. F. Zika 14114 22 Aug 1999 Potamogetonaceae WTU-342110 Potamogeton berchtoldii Fieber Potamogetonaceae U.S.A., WASHINGTON, SAN JUAN COUNTY: Sportsmans Lake. Potamogeton berchtoldii Fieber 48.568056°, -123.072778°; WGS 84, uncertainty: 500 m., Source: Georeferenced, Georef'd by WTU Staff U.S.A., WASHINGTON, SAN JUAN COUNTY: In shallow water. Phenology: Vegetative. Origin: Native. Cascade Lake, Orcas Island, east side of lake, near public swimming area. George B. Rigg 15994 2 Aug 1939 48.6525°, -122.851389°; WGS 84, uncertainty: 600 m., Source: Georeferenced, Georef'd by WTU Staff WTU-54480 Shallows on muddy/rocky bottom; growing with Najas flexilis and various other Potamogeton species. Common. Phenology: Fertile. Origin: Native. Potamogetonaceae Scott R. Atkinson 466 17 Aug 1992 Stuckenia pectinata (L.) Borner WTU-326119 U.S.A., WASHINGTON, SAN JUAN COUNTY: Orcas Island, northwest shore of Cascade Lake. Elev. 346 ft. Potamogetonaceae T37N R1W S31 NE; WGS 84, uncertainty: 600 m., Source: Georeferenced, Georef'd by WTU Staff Potamogeton pusillus L. In 2 feet of water, with Potamogeton zosteriformis, P. amplifolius and P. pusillus. Aquatic. Phenology: Vegetative. Origin: Native. U.S.A., WASHINGTON, SAN JUAN COUNTY: San Juan Island; near dock on west shore of Egg Lake, Egg Lake P. F. Zika 14154 28 Aug 1999 Road. Elev. 160 ft. WTU-340864 T36N R3W S33 SW; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Deep water, with Spirodella polyrhiza, Lemna minor and Lemna Potamogetonaceae trisulca. Phenology: Fertile. Origin: Native. Potamogeton obtusifolius Mertens & W.D.J. Koch P. F. Zika 14109 22 Aug 1999 U.S.A., WASHINGTON, SAN JUAN COUNTY: WTU-341977 [locality and coordinates withheld; status in Washington: G5/S2 (Sensitive; WANHP)] Elev. 513 ft. With Potamogeton natans, Utricularia vulgaris. Local. Phenology: Fruits. Origin: Native. P. F. Zika 14119 23 Aug 1999 WTU-342108 Potamogetonaceae Potamogetonaceae Potamogeton obtusifolius Mertens & W.D.J. Koch Potamogeton natans L. U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: [locality and coordinates withheld; status in Washington: G5/S2 Panorama Pond, San Juan Island, approximately 4.5 mile south of (Sensitive; WANHP)] Friday Harbor on American Camp Road. Elev. 210 ft. 48.470155°, -123.00528°; WGS 84, uncertainty: 500 m., Source: Deep water, with Equisetum fluviatile, Potamogeton natans. GeoLocate, Georef'd by WTU Staff Uncommon. Phenology: Vegetative. Origin: Native. Phenology: Fruits. Origin: Native. P. F. Zika 14115 22 Aug 1999 Richard E. Norris s.n. 21 Jun 1974 WTU-342109 WTU-259999

Potamogetonaceae Potamogetonaceae Potamogeton obtusifolius Mertens & W.D.J. Koch Potamogeton natans L. U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: [locality and coordinates withheld; status in Washington: G5/S2 Orcas Island, Moran State Park, Summit Lake on Mt. Constitution. (Sensitive; WANHP)] Elev. 2000-2160 ft. In mud in about 1 foot of water. Phenology: Vegetative. Origin: 48° 40' 15" N, 122° 50' 50" W; T37N R1W S21/28/29; Source: Native. Specimen label Growing near islet in lake. Leaves bronze colored. Phenology: David Sutherland 1182 26 Jun 1966 Fertile. Origin: Native. with Patricia Kern Sarah Gage G&R462 4 Jul 1992 WTU-232393 with Sharon Rodman Potamogetonaceae WTU-345060 Potamogeton obtusifolius Mertens & W.D.J. Koch Potamogetonaceae U.S.A., WASHINGTON, SAN JUAN COUNTY: [locality and coordinates withheld; status in Washington: G5/S2 Potamogeton illinoensis Morong (Sensitive; WANHP)] Many plants washed ashore or into shallows, with Ceratophyllum U.S.A., WASHINGTON, SAN JUAN COUNTY: demersum. Common. Phenology: Fruits. Origin: Native. Cascade Lake, Orcas Island, east side of lake, near public swimming area. Scott R. Atkinson 431 16 Aug 1992 48.6525°, -122.851389°; WGS 84, uncertainty: 600 m., Source: Georeferenced, Georef'd by WTU Staff WTU-325597 With Chara and Myriophyllum. Common; many plants washed ashore and growing in deep water. Phenology: Fruits. Origin: Native. Potamogetonaceae Scott R. Atkinson 433 17 Aug 1992 Potamogeton obtusifolius Mertens & W.D.J. Koch WTU-325123 U.S.A., WASHINGTON, SAN JUAN COUNTY: [locality and coordinates withheld; status in Washington: G5/S2 Potamogetonaceae (Sensitive; WANHP)] Elev. 260 ft. Potamogeton gramineus L. With Polygonum amphibium, Potamogeton natans and Lemna minor. Aquatic. Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, SAN JUAN COUNTY: Cascade Lake, Orcas Island, east side of lake, near public P. F. Zika 14072 14 Aug 1999 swimming area. 48.6525°, -122.851389°; WGS 84, uncertainty: 600 m., Source: WTU-342053 Georeferenced, Georef'd by WTU Staff With Chara and Myriophyllum. Common; many plants washed ashore and growing in deep water. Phenology: Fruits. Origin: Native. Potamogetonaceae Scott R. Atkinson 432 17 Aug 1992 Potamogeton natans L. WTU-325595 U.S.A., WASHINGTON, SAN JUAN COUNTY: Orcas Island, Summit Lake. 48.672778°, -122.835556°; WGS 84, uncertainty: 300 m., Source: Georeferenced, Georef'd by WTU Staff In muddy bottom in approximately 1 foot of water. Phenology: Fruits. Origin: Native. David Sutherland 1181 26 Jun 1966 with Patricia Kern WTU-234030 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Stuckenia filiformis (Pers.) Börner U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., ALASKA COUNTY: Cascade Lake, Orcas Island, east side of lake, near public Vicinity of East Oumalik. swimming area. 69° 50' N, 155° 30' W 48.6525°, -122.851389°; WGS 84, uncertainty: 600 m., Source: Submerged in about 1 meter of water, "large" (landing) lake. Georeferenced, Georef'd by WTU Staff With Potamogeton zosteriformis, P. amplifolius, P. alpinus, P. George H. Ward 1420 13 Aug 1952 pectinatus, P. richardsonii and P. foliosus. Infrequent; a few plants washed up on beach. Phenology: Fruits. Origin: Native. WTU-191355 Scott R. Atkinson 465 17 Aug 1992 Potamogetonaceae WTU-325120 Stuckenia filiformis (Pers.) Börner Potamogetonaceae U.S.A., IDAHO, JEFFERSON COUNTY: Warm Spring 10 miles west of Clyde. Potamogeton amplifolius Tuck. C. L. Hitchcock 15750 24 Jun 1947 U.S.A., WASHINGTON, SAN JUAN COUNTY: Orcas Island, Moran State Park, Mountain Lake. WTU-293871 Elev. 900 ft. 48.65667°, -122.81639°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Potamogetonaceae Shale-graywacke shelf overlain with shallow mud. At 8 plus feet of depth; forming dense colonies along east side of lake. Phenology: Stuckenia filiformis (Pers.) Börner Fruits. Origin: Native. U.S.A., MONTANA, GALLATIN COUNTY: Scott R. Atkinson 434 17 Aug 1992 Three Forks, 3 miles Northeast; gravel pits. Abundant. WTU-325122 W. E. Booth s.n. 10 Sep 1948 Potamogetonaceae WTU-133880 Stuckenia filiformis (Pers.) Börner Potamogetonaceae U.S.A., OREGON, DESCHUTES COUNTY: [locality and coordinates withheld; status in Oregon: S3 (Rare; Potamogeton filiformis Pers. ssp. alpinus (Blytt) D. Les & OBIC)] R. Haynes Elev. 6330 ft. Washed ashore, with Hippuris vulgaris and algae. U.S.A., MONTANA, GALLATIN COUNTY: Three Forks, 3 miles northeast; gravel pits. P. F. Zika 15329 11 Aug 2000 Abundant. WTU-346866 W. E. Booth s.n. 10 Sep 1947 Potamogetonaceae WTU-133882 Stuckenia filiformis (Pers.) Börner Potamogetonaceae U.S.A., WASHINGTON, WHATCOM COUNTY: Ross Lake Area, hozomeen Ranger Station 2.25 miles south Potamogeton gramineus L. southeast; Hozomeen Lake. Elev. 2825 ft. U.S.A., WASHINGTON, FERRY COUNTY: T40N R14E S7; WGS 84, uncertainty: 5000 m., Source: La Fleur Lake, about 8 miles north of Inchelium. GeoLocate, Georef'd by WTU Staff Elev. 2100 ft. Scattered, submerged. Rooted on rocky, muddy lake bottom; only T34N R36E S28 E 1/2; NAD 27, uncertainty: 805 m., Source: olant present. Origin: Native. TRS2LL, Georef'd by Ben Legler Depth 0.5-0.75 meters. Phenology: Fertile. Origin: Native. Ralph Naas 5187 27 Jul 1986 with Dorothy Naas Jonna Ahl s.n. 5 Aug 1983 with Janet Patton WTU-317678 WTU-352237 Potamogetonaceae Stuckenia filiformis (Pers.) Börner U.S.A., IDAHO, JEFFERSON COUNTY: Warm Spring 10 miles west of Clyde. C. L. Hitchcock 15750 24 Jun 1947 WTU-114115 Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton alpinus Balbis U.S.A., WASHINGTON, WHATCOM COUNTY: U.S.A., MONTANA, BEAVERHEAD COUNTY: Mount Baker National Forest, in Baker River, near Baker Lake. 19 miles from mouth of Wise River. 48.739156°, -121.568998°; WGS 84, uncertainty: 5000 m., Muddy pond. Phenology: Vegetative. Origin: Native. Source: GeoLocate, Georef'd by WTU Staff Phenology: Vegetative. Origin: Native. C. L. Hitchcock 15256 2 Aug 1946 with C. V. Muhlick W. C. Muenscher 7658 29 Aug 1937 WTU-107675 WTU-55799 Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton alpinus Balbis U.S.A., IDAHO, SHOSHONE COUNTY: U.S.A., WASHINGTON, KING COUNTY: Old beaver-dam near head of West Fork of Saint Maries River, 7 Snoqualmie Pas Road, just west of entrance to Denny Creek Forest miles south west of Clarkia. Camp, in a ditch along the road. Elev. 3000 ft. 47.422566°, -121.450322°; WGS 84, uncertainty: 10000 m., T42N R1E S27; WGS 84, uncertainty: 5000 m., Source: Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Cold water. Phenology: Fertile. Origin: Native. Shallow water near old beaver-dam. Phenology: Fertile. Origin: Native. David Sutherland 1102 21 Jul 1965 Arthur Cronquist 6038 6 Aug 1949 WTU-224002 with Quentin Jones WTU-169571 Potamogetonaceae Potamogeton alpinus Balbis Potamogetonaceae U.S.A., ALASKA, ALEUTIANS WEST COUNTY: Potamogeton alpinus Balbis Casco Cove, PT Base. 52.815°, 173.165556°; uncertainty: 1500 m. U.S.A., MONTANA, MISSOULA COUNTY: In running stream at sea level. Phenology: Vegetative. Origin: Mission Range, margin of Swan River at Elbow(Linberg), Lake. Native. Elev. 4000 ft. Muddy bottom in slow current, partially shaded. Phenology: Fertile. M.D. Gilmore W. Soule 471 24 Aug 1945 Origin: Native. WTU-155601 G. B. Rossbach 16 6 Aug 1936 with R. P. Rossbach Potamogetonaceae WTU-160175 Potamogeton alpinus Balbis U.S.A., ALASKA, KENAI PENINSULA COUNTY: Potamogetonaceae Resurrection River Area, Seward. 60° 8' N, 149° 25' W Potamogeton gramineus L. Rooted in mud in shallow water in pond. Very Common. Phenology: Fertile. Origin: Native. U.S.A., IDAHO, FREMONT COUNTY: Buffalo River. J. A. Calder 6623 10 Aug 1951 44.414171°, -111.393063°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff WTU-173160 Phenology: Fruits. Origin: Native. G. N. Jones 5227 4 Jul 1934 Potamogetonaceae WTU-29012 Potamogeton alpinus Balbis U.S.A., ALASKA, KENAI PENINSULA COUNTY: Potamogetonaceae About 100 yards south of Snow River bridge at south end of Kenai Lake. Potamogeton alpinus Balbis 60° 18' N, 149° 21' W Small pond. Common. Phenology: Fertile. Origin: Native. U.S.A., ALASKA, SITKA COUNTY: Chicagof Island, north part, head of Neka Bay. J. A. Calder 6568 7 Aug 1951 Salt marsh with elevated meadows between stream meanders, upper part of estuary near southwest margin, in vicinity of beaver WTU-173161 ponds. Plants abundant in sloughs along the banks, flowers emergent, some leaves floating. Phenology: Fertile. Origin: Native. Mary Clay Muller 4872 23 Jul 1982 WTU-282636 Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton gramineus L. U.S.A., ALASKA COUNTY: CANADA, BRITISH COLUMBIA: King Salmon. Between bridge at center of Skidegate Lake and east end of lake, 58.688333°, -156.661389°; WGS 84, uncertainty: 10000 m., Moresby Island. Source: GeoLocate, Georef'd by Joseph Stormer Common in aboutt 2 - 3 feet of water on sandy bottom of lake. Phenology: Fertile. Origin: Native. Floating leaves may or may not be present when plants flower. Voucher specimen for chromosome number cited in Flora of the W. B. Schofield 2721 11 Aug 1952 Queen Charlotte Islands. II. Cytological Aspects of the Vascular Flora by Roy L. Taylor and Gerald A. Mulligan. n = 26. Phenology: WTU-173013 Fruits. Origin: Native. J. A. Calder 36056 18 Jul 1964 Potamogetonaceae with R. L. Taylor Potamogeton alpinus Balbis WTU-242588 U.S.A., ALASKA, SITKA COUNTY: Chicagof Island, north part, head of Neka Bay. Potamogetonaceae Salt marsh with elevated meadows between stream meanders, upper part of estuary near southwest margin, in vicinity of beaver Potamogeton gramineus L. ponds. Plants abundant in sloughs along the banks, flowers emergent, some leaves floating. Phenology: Fertile. Origin: Native. U.S.A., IDAHO, CUSTER COUNTY: Shallow pond near Stanley Lake, Challis National Forest. Mary Clay Muller 4872 23 Jul 1982 Elev. 6500 ft. 44.21139°, -114.945°; WGS 84, uncertainty: 5000 m., Source: WTU-282638 GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Potamogetonaceae J. William Thompson 14046 29 Jul 1937 Potamogeton gramineus L. WTU-10546JWT U.S.A., MONTANA, GALLATIN COUNTY: West Yellowstone, 5 miles north of Madison River. Potamogetonaceae Abundant. Submerged. This is a voucher specimen for pollen reference collection 380, L.B.Brubaker, University of Washington. Stuckenia filiformis (Pers.) Börner Taken October, 1990. Phenology: Fruits. Origin: Native. U.S.A., IDAHO, CLARK COUNTY: unknown s.n. 24 Aug 1952 Birch Creek, 3 miles northwest of Blue Dome. 44.195905°, -112.948697°; WGS 84, uncertainty: 1000 m., WTU-233493 Source: GeoLocate, Georef'd by WTU Staff Stipules adnate to base of leaf, the sheath open. Potamogetonaceae C. L. Hitchcock 23866 6 Jul 1965 with R. Spellenberg, D. Sutherland Potamogeton amplifolius Tuck. WTU-223698 U.S.A., WASHINGTON, OKANOGAN COUNTY: McGinnis Lake, 4 miles east of Columbia River, about 6 miles southwest of Belvedere, Site A, south west bay, depth 2-3 meters. Potamogetonaceae Elev. 1500 ft. T29N R31E S2; WGS 84, uncertainty: 800 m., Source: Stuckenia filiformis (Pers.) Börner GeoLocate, Georef'd by WTU Staff Growing with Potamogeton richardonii, P. gramineus, Nitella flexilis. U.S.A., IDAHO, BONNEVILLE COUNTY: Phenology: Vegetative. Origin: Native. Growing in Fall Creek, at Mineral Springs. T1N R43E S9; WGS 84, uncertainty: 5000 m., Source: Jonna Ahl s.n. 21 Jul 1983 GeoLocate, Georef'd by WTU Staff with Judy Loescher William H. Baker 9707 7 Aug 1952 WTU-352238 WTU-296862

Potamogetonaceae Potamogeton gramineus L. U.S.A., MONTANA, MISSOULA COUNTY: In small pot hole 1 mile east of Lindberg Lake. In about 2 feet of water. . Floating leaves present; 10 to 15 nerved. Phenology: Fertile. Origin: Native. C. L. Hitchcock 13709 22 Aug 1945 with C. V. Muhlick WTU-100702 Potamogetonaceae Potamogetonaceae Potamogeton illinoensis Morong Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, JEFFERSON COUNTY: Lake Crescent. Lake Leland. 48.09472°, -123.80583°; WGS 84, uncertainty: 10000 m., Source: 47.89194°, -122.88528°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Phenology: Vegetative. Origin: Native. Phenology: Fertile. Origin: Native. Geo. N. Jones 3511 Jul 1931 I. C. Otis 1769 20 Aug 1933 WTU-21764 WTU-29589

Potamogetonaceae Potamogetonaceae Stuckenia filiformis (Pers.) Börner Potamogeton amplifolius Tuck. U.S.A., IDAHO, BLAINE COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: 1 mile south of Gannett. Cranberry Lake, Whidbey Island. 43.345515°, -114.175°; WGS 84, uncertainty: 1000 m., Source: 48.55806°, -122.22056°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Irrigation ditch. Phenology: Fertile. Origin: Native. William H. Baker 10963 11 Aug 1953 G. N. Jones 4952 2 Jun 1934 WTU-295659 WTU-315773

Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton gramineus L. U.S.A., MONTANA, LEWIS AND CLARK COUNTY: U.S.A., MONTANA, BEAVERHEAD COUNTY: Sluggish stream 2 miles northwest of Danaher Ranger Station; One mile southeast of Pintlar Lake; Anaconda Range. Flathead National Forest. In small pond, growing in about 2 feet of water. The floating leaves 47.366392°, -113.076782°; WGS 84, uncertainty: 3200 m., 13 nerved. Phenology: Fertile. Origin: Native. Source: Digital Map, Georef'd by Joseph Stormer, Invalid coordinates (located outside county bounds). C. L. Hitchcock 12878 27 Jul 1945 Phenology: Fertile. Origin: Native. with C. V. Muhlick C. L. Hitchcock 18785 22 Jul 1948 WTU-100702 WTU-125328 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, PIERCE COUNTY: Sumerged in Lake Rapjohn, north of Tacoma. U.S.A., WASHINGTON, ISLAND COUNTY: 47.25306°, -122.44306°; WGS 84, uncertainty: 10000 m., Source: Cranberry Lake, Whidbey Island. GeoLocate, Georef'd by WTU Staff 48.14389°, -122.49111°; WGS 84, uncertainty: 10000 m., Source: Phenology: Fertile. Origin: Native. GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Harold E. Helmrich 20 28 Jun 1932 G. N. Jones 4952 2 Jun 1934 WTU-306203 WTU-25467 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton gramineus L. U.S.A., MONTANA, FLATHEAD COUNTY: Deadwater, bay of Flathead Lake, Big Fork. U.S.A., MONTANA, LAKE COUNTY: Phenology: Fertile. Origin: Native. One mile south of Charlo. In shallow pond. Phenology: Fertile. Origin: Native. G. B. Rossbach 17 3 Aug 1936 with R.P. Rossbach C. L. Hitchcock 17783 27 Jun 1948 WTU-159565 WTU-125327 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton amplifolius Tuck. CANADA, BRITISH COLUMBIA: U.S.A., OREGON COUNTY: Goose Island. Sutton Creek. Floating on shallow water or temporarily lying on soft mud of small Phenology: Vegetative. Origin: Native. pans in open sphagnum muskeg. Phenology: Fertile. Origin: Native. T. Kincaid s.n. 16 Jul 1935 T. T. McCabe 7157 20 Jul 1939 WTU-34787 WTU-78115 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton amplifolius Tuck. U.S.A., IDAHO, BENEWAH COUNTY: U.S.A., IDAHO, KOOTENAI COUNTY: Benewah Lake, 3 miles west of Saint Maries. Anderson Lake, 200 yards out from east shore in 7 or 8 feet of 47.314422°, -116.625723°; WGS 84, uncertainty: 1000 m., water. Source: GeoLocate, Georef'd by WTU Staff 47.46722°, -116.74806°; WGS 84, uncertainty: 10000 m., Source: Grassy wooded shores. Phenology: Fertile. Origin: Native. GeoLocate, Georef'd by WTU Staff Submerged in 7-8 feet of water. Phenology: Fertile. Origin: Native. William H. Baker 16474 19 Jul 1963 N. R. Chupp 19 23 Jul 1954 WTU-264872 WTU-295848 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton amplifolius Tuck. CANADA, BRITISH COLUMBIA: CANADA, BRITISH COLUMBIA: Crooked River, 15 miles north of Summit Lake, which is 31 miles Kottenay Distric, large pond about 20 miles north of Kingsgate. north of Prince George. Growing in about 4 feet of water. Stems well over 2 meters long, 54.448519°, -122.653542°; WGS 84, uncertainty: 10000 m., practically unbranched, submerged leaves folded and falcate. Source: Digital Map, Georef'd by Debbie Fynn Phenology: Fertile. Origin: Unknown. In swift flowing water on the edge of a stream 6 inches deep. Stream running into the Crooked River. Possible two specimens on the C. L. Hitchcock 24041 13 Jul 1965 same sheet. Letter A may be a hybrid, per Zika. Phenology: Fertile. Origin: Native. WTU-224749 W. A. Weber 2577 1 Aug 1941 Potamogetonaceae WTU-74555A Potamogeton gramineus L. Potamogetonaceae U.S.A., OREGON, MARION COUNTY: Salem. Potamogeton amplifolius Tuck. No collection date. Phenology: Fertile. Origin: Native. U.S.A., IDAHO, BENEWAH COUNTY: O. B. Johnson s.n. Santa Creek, 1 mile south of Emida. 47.112539°, -116.598982°; WGS 84, uncertainty: 1000 m., WTU-33746 Source: GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Potamogetonaceae Marion Ownbey s.n. 24 Sep 1938 with Ruth P. Ownbey Potamogeton amplifolius Tuck. WTU-84856 U.S.A., OREGON COUNTY: Sutton Creek. Phenology: Vegetative. Origin: Native. Potamogetonaceae T. Kincaid s.n. 16 Jul 1935 Potamogeton amplifolius Tuck. WTU-34800 U.S.A., OREGON, LINN COUNTY: In a man-made pond along Pirtle Drive, about 1/2 mile east of Riverside School. Potamogetonaceae Elev. 223 ft. T11S R4W S78 Potamogeton amplifolius Tuck. Pond. Common, associated genera: Eleocharis, Myriophyllum, Callitriche, Ranuculus, Chara, Ludwigia, Alisma. Phenology: Fertile. U.S.A., OREGON COUNTY: Origin: Native. Sutton Creek. Phenology: Vegetative. Origin: Native. Richard R. Halse 3327 6 Jul 1986 T. Kincaid s.n. 16 Jul 1935 WTU-313655 WTU-34801 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton berchtoldii Fieber U.S.A., OREGON, HARNEY COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: Near Frenchglen. Owhi Lake, 5 miles northeast of Nespelem, sample 12, east shore, 42.826827°, -118.915478°; WGS 84, uncertainty: 3200 m., depth 1 meter. Source: GeoLocate, Georef'd by Joseph Stormer Elev. 2500 ft. Slough, floating and submersed. Glowers greenish. Origin: Native. T32N R31E; WGS 84, uncertainty: 1600 m., Source: Georeferenced, Georef'd by WTU Staff Albert N. Steward 6453 27 Jul 1953 Growing 1 meter deep. Associated with Ranunculus aquatilis var. with Patricia Hansen capillaceus, Zanichellia palustris. Phenology: Vegetative. Origin: Native. WTU-170012 Jonna Ahl s.n. 22 Jul 1983 with Judy Loescher Potamogetonaceae WTU-352234 Potamogeton amplifolius Tuck. U.S.A., OREGON, LANE COUNTY: Potamogetonaceae Sutton Creek. Phenology: Fertile. Origin: Native. Potamogeton gramineus L. T. Kincaid s.n. 16 Jul 1935 CANADA, BRITISH COLUMBIA: Kootenay District; in large pond about 21 miles north of Cranbrook. WTU-34788 Plants in 2 feet of water. Stems terete. Phenology: Fertile. Origin: Native. Potamogetonaceae C. L. Hitchcock 24038 13 Jul 1965 Potamogeton gramineus L. WTU-224043 CANADA, BRITISH COLUMBIA: Crooked River, 15 miles north of Summit Lake, which is 31 miles Potamogetonaceae north of Prince George. 54.448519°, -122.653542°; WGS 84, uncertainty: 10000 m., Potamogeton nodosus Poir. Source: Digital Map, Georef'd by Debbie Fynn In swift flowing water on the edge of a stream 6 inches deep. Stream CANADA, BRITISH COLUMBIA: running into the Crooked River. Possible two specimens on the [locality and coordinates withheld; status in British Columbia: S1 same sheet. Letter A may be a hybrid, per Zika. Phenology: (Critically Imperiled, Red List; BCCDC)] Vegetative. Origin: Native. Perhaps a hybrid of P. amplifolius and P. nodosus since it has characteristics of both species. W. A. Weber 2577 1 Aug 1941 T. C. Brayshaw 4063 26 Jun 1969 WTU-74555B WTU-258076 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton gramineus L. U.S.A., OREGON, LANE COUNTY: Cottage Grove Reservoir, on the east side of the lake at Wilson CANADA, BRITISH COLUMBIA: Creek State Park. Kootenay District; large pond about 20 miles north of Kingsgate. Elev. 780 ft. Plants in about 2 feet of water. Stipule sheaths closed at base. T22s R3W S5; NAD 27, uncertainty: 805 m., Source: TRS2LL, Phenology: Fertile. Origin: Native. Georef'd by Ben Legler Associated with Myriophyllum, Marsilea, Sagittaria, Ludwigia, C. L. Hitchcock 24042 13 Jul 1965 Ranunculus. Origin: Native. WTU-224081 Richard R. Halse 2420 28 Jul 1981 WTU-337567 Potamogetonaceae Potamogeton gramineus L. U.S.A., MONTANA, LAKE COUNTY: Large "pot hole" 0.2 miles southeast of Nine-Pipes Reservoir. Plants growing in about 1 foot of water. Phenology: Fertile. Origin: Native. C. L. Hitchcock 23984 11 Jul 1965 WTU-223997 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, YAKIMA COUNTY: U.S.A., WASHINGTON, KING COUNTY: In irrigation ditch at south Wapato Road, and Yost Road, 4 miles Lake Sammamish. southof Wapato. 47.6°, -122.084722°; NAD 27, uncertainty: 10000 m., Source: 46.44778°, -120.41917°; WGS 84, uncertainty: 10000 m., Source: Georeferenced, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Irrigation ditch, 2 feet deep. Phenology: Fertile. Origin: Introduced. I. C. Otis 1680 11 Aug 1929 C. L. Hitchcock 24111 2 Sep 1965 WTU-28616 WTU-224018 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Stuckenia pectinata (L.) Borner U.S.A., OREGON, POLK COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: Buena Vista, just below the ferry crossing, Willamette River. Omak Plateau, above and southeast of Omak; in Rat Lake. Elev. 164 ft. 48.21444°, -119.35417°; WGS 84, uncertainty: 10000 m., Source: T9S R4W S23; NAD 27, uncertainty: 805 m., Source: TRS2LL, GeoLocate, Georef'd by WTU Staff Georef'd by Ben Legler Origin: Native. Shallow waters of river. Leaves submerged, flowers projecting above waters surface, with algae and Lemna. Phenology: Flowers. Origin: Edmund Broch s.n. 24 Jun 1982 Introduced. WTU-352281 Richard R. Halse 2285 17 Jul 1980 WTU-286727 Potamogetonaceae Potamogeton gramineus L. Potamogetonaceae CANADA, BRITISH COLUMBIA: Potamogeton gramineus L. North of divide between Stikine and Tanzilla Rivers, Stewart Road. Elev. 3700 ft. U.S.A., IDAHO, BENEWAH COUNTY: 58° 13' N, 129° 51' W Benewah Lake, 3 miles west of Saint Maries. Muddy pond. Phenology: Fertile. Origin: Native. 47.314422°, -116.625723°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff T. C. Brayshaw s.n. 7 Aug 1971 Grassy wooded shores of Benewah Lake. Phenology: Fertile. Origin: with D. Barrett Native. WTU-263266 William H. Baker 16476 19 Jul 1963 WTU-266328 Potamogetonaceae Potamogeton crispus L. Potamogetonaceae U.S.A., WASHINGTON, KING COUNTY: Stuckenia pectinata (L.) Borner Seattle, north of western approach to Evergreen Pt. Bridge, Lake Washington. U.S.A., WASHINGTON, SKAGIT COUNTY: 47.73556°, -122.33556°; WGS 84, uncertainty: 10000 m., Source: Lake Erie. GeoLocate, Georef'd by WTU Staff 48.45279°, -122.6407°; WGS 84, uncertainty: 1000 m., Source: Lake, anchored in about 2 feet of water. Plants not reaching surface. GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Introduced. Origin: Native. David Sutherland 1095 18 Jul 1965 Trevor Kincaid s.n. 6 Sep 1934 with Don Simpson WTU-25279 WTU-224000 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, GRANT COUNTY: U.S.A., WASHINGTON, GRANT COUNTY: Submerged in lake below the Dry Falls, Grand Coulee. Cow-fly Lake, Grand Coulee. 47.60472°, -119.34639°; WGS 84, uncertainty: 10000 m., Source: 47.94167°, -119.00222°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Origin: Native. J. William Thompson 7193 30 Jun 1931 T. H. Scheffer s.n. 24 Aug 1945 WTU-24562JWT WTU-100635 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Stuckenia pectinata (L.) Borner U.S.A., MONTANA COUNTY: U.S.A., WASHINGTON, KING COUNTY: Moose Creek, near Big Springs. West side of Lake Sammamish. Clear, cold stream. Phenology: Fertile. Origin: Native. 47.64194°, -122.07917°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff G. B. Rossbach 20 20 Aug 1936 Origin: Native. with R. P. Rossbach I. C. Otis 1749 11 Aug 1933 WTU-159567 WTU-24567JWT Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton crispus L. U.S.A., IDAHO, ADA COUNTY: Eagle Island off of Linder Road, Boise River northwest of Boise, U.S.A., OREGON, CURRY COUNTY: west of Eagle. Rogue River at Cherry Flat, 4 miles north of Agness. Elev. 2500 ft. River. Phenology: Fertile. Origin: Introduced. T4N R1W S14 NE1/4; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff William H. Baker 4690 1 Aug 1947 Sandy gravelly soil with cottonwood and silver maple dominant, shallow pond in sandbar. Locally abundent, influorescence WTU-129457 emergent. Phenology: Fertile. Origin: Introduced. Barbara Ertter 4508 14 Jul 1981 Potamogetonaceae with Sarah Richard Harris, James W. Grimes Stuckenia pectinata (L.) Borner WTU-286626 U.S.A., WASHINGTON, WHITMAN COUNTY: Shallow water, Snake River, Wawawaii. Potamogetonaceae 46.63692°, -117.38033°; WGS 84, uncertainty: 500 m., Source: GeoLocate, Georef'd by WTU Staff Stuckenia pectinata (L.) Borner Origin: Native. U.S.A., WASHINGTON, KING COUNTY: F. A. Warner 166 West side of Lake Sammamish. 47.64194°, -122.07917°; WGS 84, uncertainty: 10000 m., Source: WTU-27094 GeoLocate, Georef'd by WTU Staff Origin: Native. Potamogetonaceae I. C. Otis 1749 11 Aug 1933 Potamogeton crispus L. WTU-26600 U.S.A., OREGON, BENTON COUNTY: Bank of Willamette River, near Peoria Ferry landing. Potamogetonaceae In pond on bank. Phenology: Fertile. Origin: Introduced. Potamogeton gramineus L. Helen M. Gilkey s.n. 15 Jul 1949 U.S.A., MONTANA, GALLATIN COUNTY: WTU-149244 West Yellowstone, 5 miles north of Madison River. Submerged. Abundant. Phenology: Fertile. Origin: Native. Potamogetonaceae unknown s.n. 24 Aug 1952 Potamogeton gramineus L. WTU-149051 U.S.A., IDAHO, OWYHEE COUNTY: In Rock Creek near Triangle. Potamogetonaceae 42.784862°, -116.623964°; WGS 84, uncertainty: 5000 m., Source: GeoLocate, Georef'd by WTU Staff Stuckenia pectinata (L.) Borner Occasional. Phenology: Fertile. Origin: Native. U.S.A., WASHINGTON, SNOHOMISH COUNTY: William H. Baker 8576 12 Aug 1951 Teal Slough, near Stanwood. 48.24139°, -122.36944°; WGS 84, uncertainty: 5000 m., Source: WTU-295845 GeoLocate, Georef'd by WTU Staff Origin: Native. Trevor Kincaid s.n. 16 Jul 1934 WTU-25280 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, KING COUNTY: U.S.A., MONTANA, PHILLIPS COUNTY: Lake Sammamish. Small stockpond along Highway 19/191. 47.6°, -122.084722°; NAD 27, uncertainty: 10000 m., Source: Elev. 2800 ft. Georeferenced, Georef'd by WTU Staff T22N R23R S12 SE 1/4 Origin: Native. Klaus H. Lackschewitz 8579 19 Aug 1978 I. C. Otis 1680 11 Aug 1929 WTU-285448 WTU-24568JWT Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton crispus L. U.S.A., OREGON, JACKSON COUNTY: U.S.A., IDAHO, ADA COUNTY: In the Applegate River at Applegate Bridge Way side Park in West side Highway 55 south of Eagle, sandbar on north side of Applegate where State Highway 238 crosses the river. Boise River. Elev. 1256 ft. Elev. 2550 ft. T38S R4W S22; NAD 27, uncertainty: 805 m., Source: TRS2LL, T4N R1E S17 SENE; WGS 84, uncertainty: 10000 m., Source: Georef'd by Ben Legler GeoLocate, Georef'd by WTU Staff Current swift, water cold, river. Common, forming large beds. Submersed in shallow water. Common. Phenology: Fertile. Origin: Phenology: Vegetative. Origin: Introduced. Introduced. Richard R. Halse 2443 30 Jul 1981 Barbara Ertter 3964 14 Aug 1980 with Jeffery Strachan WTU-337541 WTU-284573 Potamogetonaceae Potamogetonaceae Potamogeton diversifolius Raf. Stuckenia pectinata (L.) Borner U.S.A., OREGON, HARNEY COUNTY: [locality and coordinates withheld; status in Oregon: S1 (Critically U.S.A., WASHINGTON, KING COUNTY: Imperiled; OBIC)] West side of Lake Sammamish. Shallow water, basalt derived soils. Abundent. Phenology: Fertile. 47.64194°, -122.07917°; WGS 84, uncertainty: 10000 m., Source: Origin: Native. GeoLocate, Georef'd by WTU Staff Origin: Native. Bassett Maguire 26750 31 Jul 1946 with Arthur H. Holmgren I. C. Otis 1749 11 Aug 1933 WTU-111653 WTU-15696JWT Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogeton gramineus L. U.S.A., IDAHO, BENEWAH COUNTY: U.S.A., IDAHO, BONNER COUNTY: Benewah Lake, 3 miles west of Saint Maries. Kalispell Bay, Priest Lake. 47.314422°, -116.625723°; WGS 84, uncertainty: 1000 m., 48.56389°, -116.92444°; WGS 84, uncertainty: 10000 m., Source: Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Open water. Lake water 4 decimeters deep. Vegetation zone: arborvitae - hemlock. Dominant. Submerged. Phenology: Fertile. Origin: Native. William H. Baker 16459 19 Jul 1963 R. F. Daubenmire 44441 8 Sep 1944 WTU-266352 WTU-268150 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Stuckenia pectinata (L.) Borner U.S.A., ALASKA COUNTY: Attu Island. One mile west of mouth of Temnac River. U.S.A., WASHINGTON, KING COUNTY: Elev. 100 ft. East side of Lake Sammamish. 52.824076°, 173.034766°; WGS 84, uncertainty: 750 m., Source: 47.64194°, -122.07917°; WGS 84, uncertainty: 10000 m., Source: Digital Map, Georef'd by Joseph Stormer GeoLocate, Georef'd by WTU Staff Small pond, 3 feet deep, muddy bottom. Phenology: Vegetative. Origin: Native. Origin: Native. I. C. Otis 1710 7 Jul 1933 Robert M. Hardy 251 27 Jul 1945 WTU-26602 WTU-97391 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogeton diversifolius Raf. U.S.A., IDAHO, CANYON COUNTY: U.S.A., OREGON, LAKE COUNTY: 4 miles northwest of Nampa. [locality and coordinates withheld; status in Oregon: S1 (Critically 43.581786°, -116.619019°; WGS 84, uncertainty: 1000 m., Imperiled; OBIC)] Source: GeoLocate, Georef'd by WTU Staff Small pond, in about 1 feet of water, in deep mud. Stipules coonate Irrigarion canal. to base of leaves. Phenology: Fertile. Origin: Native. William H. Baker 8425 8 Aug 1951 C. L. Hitchcock 24010 11 Jul 1965 with R. Spellenberg, D. Sutherland WTU-295657 WTU-224348 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Stuckenia pectinata (L.) Borner U.S.A., WASHINGTON, FERRY COUNTY: San Poil River, 2.5 miles southeast of Keller on Silver Creek Road. U.S.A., IDAHO, OWYHEE COUNTY: T31N R33E S33; NAD 27, uncertainty: 805 m., Source: TRS2LL, Slough, 7 miles southeast of Jordan Valley. Georef'd by Ben Legler Start of backup from dam, formerly dry land. Associated with P. William H. Baker 7957 15 Jul 1951 pectinatus. Phenology: Fertile. Origin: Native. WTU-295660 Jonna Ahl s.n. 9 Aug 1983 with Janet Patton Potamogetonaceae WTU-352241 Potamogeton gramineus L. × Potamogeton praelongus Wulf. Potamogetonaceae U.S.A., WASHINGTON, ISLAND COUNTY: Stuckenia pectinata (L.) Borner South shores of Cranberry Lake; north end of Whidbey Island, southwest end Deception Pass, Puget Sound. U.S.A., IDAHO, POWER COUNTY: Elev. 6 ft. Five miles southwest of American Falls; at Indian Springs. 48° 24' N, 122° 39' W; T34N R1E S35 42.72472°, -112.87306°; WGS 84, uncertainty: 5000 m., Source: With Elodea canadensis, P. praelongus, P. amplifolius, P. pusillus, GeoLocate, Georef'd by WTU Staff Ceratophyllum demersum. Common aquatic, branched, with floating Slow moving warm water creek. leaves, submerged leaves clasping, never cucullate at tip. Phenology: Fertile. Origin: Native. J. H. Christ 19944 9 Jul 1950 with C. B. Christ P. F. Zika 17601 22 Aug 2002 with C. B. Hellquist, F. Weinmann WTU-295658 WTU-352619 Potamogetonaceae Potamogetonaceae Potamogeton diversifolius Raf. Stuckenia pectinata (L.) Borner U.S.A., OREGON, LAKE COUNTY: [locality and coordinates withheld; status in Oregon: S1 (Critically U.S.A., ALASKA COUNTY: Imperiled; OBIC)] Middleton is located in the Gulf of Alaska about 115 iles south of Elev. 4300 ft. Valdez; area behind sandy beach ridge; edge of shallow pond, Open water in center of mudflat. Abundant, submersed and floating. surrounded by Carex. Phenology: Fertile. Origin: Native. 59° 25' N, 146° 20' W Barbara Ertter 3873 29 Jul 1980 John H. Thomas 6421 5 Aug 1956 with Jeffery Strachan WTU-181722 WTU-284822 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Stuckenia pectinata (L.) Borner U.S.A., OREGON COUNTY: U.S.A., IDAHO, OWYHEE COUNTY: Sutton Creek. At Sucker Creek, one-half mile west of Homedale. Phenology: Vegetative. Origin: Native. 43.61778°, -116.93278°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff T. Kincaid s.n. 16 Jul 1935 Frequent, growing in the water. WTU-34672 William H. Baker 8449 8 Aug 1951 WTU-296861 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Stuckenia pectinata (L.) Borner U.S.A., OREGON, LANE COUNTY: CANADA, BRITISH COLUMBIA: Sutton Creek. Guichon Creek, ca. 13 miles south of Savona. Phenology: Vegetative. Origin: Native. Elev. 3500 ft. 50.591843°, -120.872925°; WGS 84, uncertainty: 10000 m., T. Kincaid s.n. 16 Jul 1935 Source: Digital Map, Georef'd by Joseph Stormer Small lake among grassy hills. WTU-34802 C. L. Hitchcock 7438 24 Jun 1941 with J. S. Martin Potamogetonaceae WTU-68197 Stuckenia pectinata (L.) Borner U.S.A., MONTANA COUNTY: Potamogetonaceae Moose Creek, near Big Springs. Clear. cold stream. Potamogeton epihydrus Raf. G. B. Rossbach 19 20 Aug 1936 U.S.A., MONTANA, BEAVERHEAD COUNTY: with R. P. Rossbach Slough on west side of Big Hole River 6 miles north of Wisdom. 45.7015°, -113.451408°; WGS 84, uncertainty: 3200 m., Source: WTU-160302 Digital Map, Georef'd by Joseph Stormer Small slough. Floating leaves abouth 13-nerved. Phenology: Fertile. Origin: Native. Potamogetonaceae C. L. Hitchcock 12580 21 Jul 1945 Potamogeton epihydrus Raf. with C. V. Muhlick U.S.A., OREGON, KLAMATH COUNTY: WTU-100723 In Deschutes River, Crescenti. Phenology: Fertile. Origin: Native. Potamogetonaceae Morton E. Peck 9590 20 Jul 1920 Stuckenia pectinata (L.) Borner WTU-19140JWT U.S.A., MONTANA, FLATHEAD COUNTY: Wininger Slough, 6 miles northeast of Kalispell. Potamogetonaceae J. M. Rogers 1145 1 Aug 1942 Stuckenia pectinata (L.) Borner with H. T. Rogers U.S.A., OREGON, HARNEY COUNTY: WTU-243387 Malheur Lake, east side. Elev. 4100 ft. Submersed and rooting in wet mud of shallow lake. Dominant; fruit Potamogetonaceae brown. Potamogeton epihydrus Raf. Albert N. Steward 7229 8 Aug 1956 with David G. Marshall U.S.A., IDAHO, OWYHEE COUNTY: Boulder Creek. WTU-170139 Elev. 3500 ft. 42.837948°, -116.815698°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Potamogetonaceae Margins of quiet streams. Phenology: Fertile. Origin: Native. Stuckenia pectinata (L.) Borner J. Francis Macbride 519 31 Jul 1910 U.S.A., OREGON, LAKE COUNTY: WTU-242925 North end of Summer Lake. Nearly fresh pond. Potamogetonaceae Morton E. Peck 15697 16 Jul 1927 Potamogeton epihydrus Raf. WTU-24704JWT CANADA, BRITISH COLUMBIA: In front of Dick Corliss's Boathouse, Summit Lake, 31 miles north of Potamogetonaceae Prince George. 54.283802°, -122.649251°; WGS 84, uncertainty: 5000 m., Potamogeton epihydrus Raf. Source: Digital Map, Georef'd by Debbie Fynn Shallow water. Phenology: Fertile. Origin: Unknown. U.S.A., OREGON, DESCHUTES COUNTY: Bend. W. A. Weber 2584 1 Aug 1941 44.058173°, -121.31531°; WGS 84, uncertainty: 8528 m., Source: GeoLocate, Georef'd by Joseph Stormer WTU-74557 River. Phenology: Fertile. Origin: Native. Morton E. Peck 15740 19 Jul 1927 WTU-19141JWT Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton praelongus Wulfen U.S.A., IDAHO, BENEWAH COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: In pond formed by railroad embankment, along northwest side of McGinnis Lake, 4 miles east of Columbia River, about 6 miles Lake Chatcolet, 10 miles northeast of Plummer. southwest of Belvedere, Site A, south west bay, depth 2-3 meters. Elev. 2200 ft. Elev. 1500 ft. T47N R3W S31; NAD 27, uncertainty: 805 m., Source: TRS2LL, T29N R31E S2; WGS 84, uncertainty: 800 m., Source: Georef'd by Ben Legler GeoLocate, Georef'd by WTU Staff Pond. Phenology: Fertile. Origin: Native. Origin: Native. Arthur Cronquist 5960 16 Jul 1949 Jonna Ahl s.n. 21 Jul 1983 with Quentin Jones with Judy Loescher WTU-169570 WTU-352240

Potamogetonaceae Potamogetonaceae Potamogeton praelongus Wulfen Potamogeton gramineus L. U.S.A., WASHINGTON, JEFFERSON COUNTY: U.S.A., WASHINGTON, KING COUNTY: Lake Leland. Seattle. 47.89194°, -122.88528°; WGS 84, uncertainty: 10000 m., Source: 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., GeoLocate, Georef'd by WTU Staff Source: Digital Map, Georef'd by Joseph Stormer Origin: Native. Phenology: Fertile. Origin: Native. I. C. Otis 1767 20 Aug 1933 C. V. Piper s.n. 11 Jul 1889 WTU-24697JWT WTU-33745

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton praelongus Wulfen U.S.A., OREGON, BENTON COUNTY: U.S.A., OREGON, LANE COUNTY: Slough near bridge, McFadden's Marsh, 12 miles south of Corvallis. Miller's Arm, Siltcoos Lake, 6 miles southeast of Florence. T13S R5W S33; NAD 27, uncertainty: 805 m., Source: TRS2LL, T19s R11W S19 SW 1/4; NAD 27, uncertainty: 805 m., Source: Georef'd by Ben Legler TRS2LL, Georef'd by Ben Legler Slough. Floating and submerge, in 1-2 feet of water, frawn green. Frequent with Anacharis spp. Submersed herb; fruit green. Origin: Phenology: Fertile. Origin: Native. Native. A. N. Steward 16585 17 Sep 1953 Albert N. Steward 6853 18 Sep 1954 with T. Ishimatoa with John Wirtz, Felicia Wirtz WTU-295846 WTU-284781

Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, FERRY COUNTY: U.S.A., IDAHO, KOOTENAI COUNTY: North shore, sample A, depth 3 meters. Black Lake, north end of Lake. 47.92663°, -118.55161°; WGS 84, uncertainty: 25000 m., Source: 47.46194°, -116.65944°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Associated with Nitella flexilis. Origin: Native. Phenology: Vegetative. Origin: Native. Jonna Ahl s.n. 27 Jul 1983 N. R. Chupp 32 2 Sep 1954 with Judy Loescher WTU-295820 WTU-356386 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton gramineus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Seattle. Seattle. 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., Source: Digital Map, Georef'd by Joseph Stormer Source: Digital Map, Georef'd by Joseph Stormer Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. C. V. Piper s.n. 15 Jun 1889 C. V. Piper s.n. 15 Jun 1889 WTU-33732 WTU-33747 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton epihydrus Raf. ? CANADA, BRITISH COLUMBIA: U.S.A., WASHINGTON, CLALLAM COUNTY: About 2 miles south of Crown Zellerbach logging camp at Sandspit, Ozette Lake. Moresby Island. Elev. 25 ft. Mucky bottom pool besides road. Common. Phenology: Fertile. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Origin: Unknown. GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. J. A. Calder 36084 18 Jul 1964 with R. L. Taylor I. C. Otis 1585 21 Aug 1927 WTU-242586 WTU-18925JWT

Potamogetonaceae Potamogetonaceae Potamogeton praelongus Wulfen Potamogeton epihydrus Raf. U.S.A., IDAHO, VALLEY COUNTY: U.S.A., WASHINGTON, COWLITZ COUNTY: Warm Lake, 26 miles east of Cascade. Silver Lake. 44.515173°, -115.51275°; WGS 84, uncertainty: 1000 m., Source: 46.29583°, -122.7825°; WGS 84, uncertainty: 4567 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by Maria Yousoufian Open water. Origin: Native. Phenology: Fertile. Origin: Native. William H. Baker 11752 11 Jul 1954 I. C. Otis 1765 16 Aug 1933 WTU-295837 WTU-26599

Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton gramineus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Shallow water in Lake Washington, Mercer Island. Seattle. 47.57083°, -122.22083°; WGS 84, uncertainty: 10000 m., Source: 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., GeoLocate, Georef'd by WTU Staff Source: Digital Map, Georef'd by Joseph Stormer Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. J. William Thompson 7589 24 Jul 1931 I. L. Norberg s.n. 1 Aug 1933 WTU-24576JWT WTU-26196

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton epihydrus Raf. CANADA, BRITISH COLUMBIA: U.S.A., WASHINGTON, WHATCOM COUNTY: 2 miles northwest of Tlell on road to Port Clements, Graham Island. Samish Lake. In shallow pool in roadside gravel pit. Very common. Phenology: 48.667607°, -122.394115°; WGS 84, uncertainty: 2750 m., Fertile. Origin: Unknown. Source: Digital Map, Georef'd by Ibro Polovina Phenology: Fertile. Origin: Native. J. A. Calder 35694 2 Jul 1964 with R. L. Taylor W. C. Muenscher 10512 6 Aug 1939 WTU-242587 WTU-55320

Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton gramineus L. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, KLICKITAT COUNTY: Ozette Lake. Falcon Valley. Elev. 25 ft. 45.977122°, -121.306515°; WGS 84, uncertainty: 8021 m., 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Source: Digital Map, Georef'd by Sara Legler GeoLocate, Georef'd by WTU Staff Shallow water. Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. Wilhelm N. Suksdorf s.n. 1 Aug 1885 I. C. Otis 1585 21 Aug 1927 WTU-117872 WTU-15694JWT Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, CLALLAM COUNTY: Lake Ozette. Lake Ozette. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Shallow water. Phenology: Fertile. Origin: Native. Erna Gunther s.n. 30 Jun 1935 J. William Thompson 9422 13 Jul 1933 WTU-32230 WTU-24561JWT

Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, KING COUNTY: Ozette Lake. North end of Lake Washington. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: 47.75366°, -122.26139°; WGS 84, uncertainty: 2000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. I. C. Otis 1584 21 Aug 1927 I. C. Otis 2121 26 Jul 1936 WTU-24560JWT WTU-51917

Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. × Potamogeton illinoensis Potamogeton epihydrus Raf. Morong U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, CHELAN COUNTY: Road to King Lake Bog, 2 miles from gravel road along road with Camas Land, Wenatchee Mountains. center vegetation. Elev. 3000 ft. 47.39361°, -122.42361°; WGS 84, uncertainty: 10000 m., Source: 47.46722°, -120.56917°; WGS84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff In swamp, shallow water, with Typha, 3 other Potamogeton sp., Small pond in Camas Land. Phenology: Fertile. Origin: Native. Chara. Very abundant. Phenology: Fertile. Origin: Native. J. William Thompson 11768 20 Jun 1935 David Sutherland 1108 22 Jul 1965 WTU-34378 WTU-224080

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton gramineus L. × Potamogeton illinoensis Morong U.S.A., WASHINGTON, CLALLAM COUNTY: Ozette Lake. U.S.A., WASHINGTON, KLICKITAT COUNTY: Elev. 25 ft. Falcon Valley. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: 45.977122°, -121.306515°; WGS 84, uncertainty: 8021 m., GeoLocate, Georef'd by WTU Staff Source: Digital Map, Georef'd by Sara Legler Phenology: Fertile. Origin: Native. Notes written on a label: cf alpinus. heterophyllus by the reticulation of the submerged leaves. This should be nuttallii. Phenology: Fertile. I. C. Otis 1585 21 Aug 1927 Origin: Native. WTU-24708JWT Wilhelm N. Suksdorf s.n. 27 Jun 1882 WTU-117871 Potamogetonaceae Potamogeton epihydrus Raf. Potamogetonaceae U.S.A., WASHINGTON, CLALLAM COUNTY: Potamogeton gramineus L. Ozette Lake. Elev. 25 ft. U.S.A., WASHINGTON, CLALLAM COUNTY: 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Lake Ozette. GeoLocate, Georef'd by WTU Staff 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Phenology: Fertile. Origin: Native. GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. I. C. Otis 1585 21 Aug 1927 G. N. Jones 5955 12 Aug 1934 WTU-28283 WTU-36471 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., OREGON COUNTY: Along outlet of Lake Ozette. Sutton Creek. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: Phenology: Vegetative. Origin: Native. GeoLocate, Georef'd by WTU Staff Mud outlet. Growing in mud. Phenology: Fertile. Origin: Native. T. Kincaid s.n. 16 Jul 1935 C. L. Hitchcock 24092 28 Jul 1965 WTU-34789 WTU-224597 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton epihydrus Raf. U.S.A., OREGON, BENTON COUNTY: Slough near bridge, McFadden's Marsh, 12 miles south of Corvallis. U.S.A., WASHINGTON, KING COUNTY: T13S R5W S33; NAD 27, uncertainty: 805 m., Source: TRS2LL, Mud Lake. Georef'd by Ben Legler 47.27361°, -122.30944°; WGS 84, uncertainty: 10000 m., Source: Slough, marsh. Floating and submersed, in 1-2 feet of water, fr. GeoLocate, Georef'd by WTU Staff green. Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. Albert N. Steward 6585 17 Sep 1953 Trevor Kincaid s.n. 30 Jun 1934 with T. Ishimoto WTU-25285 WTU-15521

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton illinoensis Morong U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, KING COUNTY: Ozette Lake. Growing in about 10 feet of water in Sawyer Lake. Elev. 25 ft. 47.33353°, -122.03633°; WGS 84, uncertainty: 1300 m., Source: 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. Carl English Jr. 1445 19 Aug 1928 I. C. Otis 1585 21 Aug 1927 WTU-24577JWT WTU-2324JWT Potamogetonaceae Potamogetonaceae Potamogeton illinoensis Morong Potamogeton epihydrus Raf. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: Latah Creek. Montesano. 47.28167°, -117.15444°; WGS 84, uncertainty: 1000 m., Source: 46.98139°, -123.60139°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Wilhelm N. Suksdorf 9055 7 Sep 1916 J. M. Grant s.n. Jul 1918 WTU-117875 WTU-43842 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, OKANOGAN COUNTY: U.S.A., WASHINGTON, CLALLAM COUNTY: Buffalo Lake, 4 miles east of Belvedere, sample A, southwest lobe of Outlet of Ozette Lake. lake at public acess, depth 2 meters. 48.155°, -124.66583°; WGS 84, uncertainty: 10000 m., Source: T30N R31E S34; WGS 84, uncertainty: 800 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Shallow water. Growing in about 1 feet of water, plants decidedly Growing with Eleocharis acicularis, Ranunculus aquatilis, reddish. Phenology: Fertile. Origin: Native. Charaglobularis, Myriophyllum spicatum, Najas flexilis, Potamogeton pectinatus, P. alpinus. Phenology: Vegetative. Origin: Native. C. L. Hitchcock 24090 28 Jul 1965 Edmund Broch s.n. 30 Jun 1983 WTU-223928 with Jonna Ahl WTU-352243 Potamogetonaceae Potamogetonaceae Potamogeton illinoensis Morong Potamogeton foliosus Raf. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., MONTANA, LAKE COUNTY: Meadow Lake. Arlee. 47.7675°, -117.35389°; WGS 84, uncertainty: 1000 m., Source: Deadwater with Chara. Phenology: Flowers. Origin: Native. GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. G. B. Rossbach 18 1 Aug 1936 with R. P. Rossbach T. Kincaid s.n. 29 Aug 1935 WTU-159566 WTU-34799 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton illinoensis Morong U.S.A., WYOMING COUNTY: U.S.A., IDAHO, FREMONT COUNTY: Slide Creek, Yellowstone Park. Along Buffalo River, Ponds Lodge, Targhee National Forest, Island In water. Phenology: Fertile. Origin: Unknown. Park. T13N R43E S27; WGS 84, uncertainty: 10000 m., Source: Ray J. Davis 5424 28 Jul 1953 GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. WTU-184445 William H. Baker 9819 20 Aug 1952 Potamogetonaceae WTU-295844 Potamogeton foliosus Raf. Potamogetonaceae U.S.A., PENNSYLVANIA COUNTY: Vicinity of Lakeview. Potamogeton foliosus Raf. In stream from hot springs. Phenology: Fertile. Origin: Unknown. U.S.A., WASHINGTON, GRANT COUNTY: Morton E. Peck 15366 10 Jun 1927 South of Moses Lake in Pot Holes dam area. 47.08028°, -119.33306°; WGS 84, uncertainty: 10000 m., Source: WTU-24707JWT GeoLocate, Georef'd by WTU Staff Shallow pond. Phenology: Fertile. Origin: Native. Potamogetonaceae C. F. Yocom s.n. 29 Jun 1948 Potamogeton foliosus Raf. WTU-132690 U.S.A., OREGON, HARNEY COUNTY: In irrigating ditch at Frenchglen. Potamogetonaceae Irrigating ditch. Phenology: Flowers. Origin: Native. Potamogeton foliosus Raf. J. William Thompson 12068 15 Jul 1935 U.S.A., WASHINGTON, SAN JUAN COUNTY: WTU-15691JWT Sportsmans Lake; San Juan Islands. 48.568056°, -123.072778°; WGS 84, uncertainty: 500 m., Source: Georeferenced, Georef'd by WTU Staff Potamogetonaceae In deep water. Phenology: Fertile. Origin: Native. Potamogeton foliosus Raf. Morton E. Peck 13051 21 Jul 1923 U.S.A., IDAHO, ELMORE COUNTY: WTU-24555JWT Near Boise river 10 miles east of Featherville. 43.711157°, -115.635663°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff Potamogetonaceae Shallow pools. Phenology: Fertile. Origin: Native. Potamogeton illinoensis Morong C. L. Hitchcock 10409a 27 Jul 1944 with C. V. Muhlick U.S.A., OREGON, HARNEY COUNTY: Harney Valley. WTU-91591 In a warm spring. Phenology: Fertile. Origin: Native. Thomas Howell s.n. 10 Jun 1885 Potamogetonaceae WTU-24703JWT Potamogeton foliosus Raf. U.S.A., OREGON, LANE COUNTY: Tsiltcoos Lake. Phenology: Vegetative. Origin: Native. Morton E. Peck 13561 30 Jul 1924 WTU-24716JWT Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton foliosus Raf. U.S.A., IDAHO, BOISE COUNTY: U.S.A., IDAHO, GOODING COUNTY: Marsh 20 miles south of Idaho City on Boise Road. Livestock pond south of Davis Mountain Peak. Marsh. Phenology: Fertile. Origin: Native. Elev. 5000 ft. 43° 10' N, 114° 48' W; T3S R14E S4 SWSW C. L. Hitchcock 9947 15 Jul 1944 Livestock pond. Submerged aquatic, rooted in mud. Phenology: with C. V. Muhlick Vegetative. Origin: Native. WTU-91692 James F. Smith 3198 17 Jul 1994 WTU-331203 Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae CANADA, ALBERTA: Potamogeton friesii Rupr. [locality and coordinates withheld; status in Alberta: S2 (Imperiled; ABNHIC)] CANADA, BRITISH COLUMBIA: Ditch. Phenology: Vegetative. Origin: Unknown. Near Blackwater Lake, circa 32 miles north of Golden. Elev. 2150 ft. A.H.B. 536 24 Jun 1922 51.62337°, -117.40662°; uncertainty: 3200 m., Georef'd by Joseph Stormer WTU-27108 Entirely submerged. Phenology: Fertile. Origin: Unknown. C. L. Hitchcock 7645 11 Jul 1941 Potamogetonaceae WTU-68071 Potamogeton foliosus Raf. U.S.A., IDAHO, ELMORE COUNTY: Potamogetonaceae Near Boise river 10 miles east of Featherville. 43.711157°, -115.635663°; WGS 84, uncertainty: 1000 m., Potamogeton richardsonii (A. Benn.) Rydb. Source: GeoLocate, Georef'd by WTU Staff Shallow pool. Phenology: Vegetative. Origin: Native. U.S.A., WASHINGTON, ISLAND COUNTY: Cranberry Lake, Deception Pass State Park, Whidbey Island. C. L. Hitchcock 10409 27 Jul 1944 48.14389°, -122.49111°; WGS 84, uncertainty: 10000 m., Source: with C. V. Muhlick GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. WTU-91590 Harold W. Smith 1547 10 Aug 1936 Potamogetonaceae WTU-221513 Potamogeton foliosus Raf. Potamogetonaceae U.S.A., OREGON, UMATILLA COUNTY: In Long Meadow, Blue Mountains. Potamogeton richardsonii (A. Benn.) Rydb. T6S R33E S25; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler U.S.A., WASHINGTON, KING COUNTY: In shallow side-pool, lodepole pine border. Phenology: Vegetative. Lake Sammamish. Origin: Native. 47.6°, -122.084722°; NAD 27, uncertainty: 10000 m., Source: Georeferenced, Georef'd by WTU Staff C. L. Hitchcock 21902 2 Aug 1959 Phenology: Fertile. Origin: Native. with C. V. Muhlick I. C. Otis 1678 11 Aug 1929 WTU-209401 WTU-24692JWT Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., MONTANA, JEFFERSON COUNTY: About 10 miles east of Whitehall. U.S.A., WASHINGTON, KING COUNTY: Roadside swamp. Plants in about 6 feet of water, stems Lake Washington. compressed, stipule shealth open, glands at base of leaves obvious. 47.62451°, -122.25583°; WGS 84, uncertainty: 14500 m., Source: Phenology: Vegetative. Origin: Native. GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. C. L. Hitchcock 23938 10 Jul 1965 with R. Spellenberg, D. Sutherland Emma A. Shumway s.n. Sep 1892 WTU-223579 WTU-118906 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, KING COUNTY: CANADA, BRITISH COLUMBIA: Shallow water in Lake Washington, Mercer Island. Near bridge 1/2 mile south of Wasa on highway to Fort Steele. 47.57083°, -122.22083°; WGS 84, uncertainty: 10000 m., Source: Open water slough with gravelly bottom. Common. Phenology: GeoLocate, Georef'd by WTU Staff Flowers. Origin: Unknown. Shallow water. Phenology: Fertile. Origin: Native. R. L. Taylor 1348 10 Jun 1958 J. William Thompson 7594 24 Jul 1931 with D. H. Ferguson WTU-24565JWT WTU-233787

Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, KING COUNTY: U.S.A., ALASKA, SOUTHEAST FAIRBANKS COUNTY: Seattle. Quartz Lake. 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., 64° 12' N, 145° 50' W Source: Digital Map, Georef'd by Joseph Stormer In 3-4 inches of water. Common. Phenology: Flowers. Origin: Native. Phenology: Fertile. Origin: Native. W. J. Cody 6068 18 Jul 1951 C. V. Piper s.n. 26 Jun 1889 with T. J. M. Webster WTU-38740 WTU-173170

Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, KING COUNTY: U.S.A., OREGON, DESCHUTES COUNTY: Seattle. Near crossing of Little Deechutes River and highway to Pringle Falls. 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., Flowing stream. Submersed. Phenology: Flowers. Origin: Native. Source: Digital Map, Georef'd by Joseph Stormer Phenology: Fertile. Origin: Native. Albert N. Steward 6801 4 Aug 1954 C. V. Piper s.n. 15 Jun 1889 WTU-295860 WTU-33741 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., IDAHO, KOOTENAI COUNTY: Medicine Lake across from Medimont Fire Guards Station. CANADA, BRITISH COLUMBIA: 47.46667°, -116.58472°; WGS 84, uncertainty: 10000 m., Source: 4-10 feets deep, in the Crooked River, 20 miles north of Summit GeoLocate, Georef'd by WTU Staff Lake, which is 31 miles north of Prince George. Phenology: Flowers. Origin: Native. 54.364893°, -122.766667°; WGS 84, uncertainty: 47951 m., Source: GeoLocate, Georef'd by Debbie Fynn N. R. Chupp 10 17 Jul 1954 In rather slow water. Phenology: Flowers. Origin: Unknown. WTU-295859 W. A. Weber 2578 1 Aug 1941 WTU-74561 Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogetonaceae U.S.A., IDAHO, OWYHEE COUNTY: Potamogeton richardsonii (A. Benn.) Rydb. Duck Valley Marsh, Riddle. 42.18694°, -116.10944°; WGS 84, uncertainty: 10000 m., Source: CANADA, BRITISH COLUMBIA: GeoLocate, Georef'd by WTU Staff Pillar Lake, about 8 miles northwest of Falkland. Roadside pond. Occasional. Phenology: Flowers. Origin: Native. Elev. 2890 ft. Lake, water 30-50 centimeters deep. Phenology: Flowers. Origin: William H. Baker 8471 10 Aug 1951 Unknown. WTU-295866 C. L. Hitchcock 7499 30 Jun 1941 with J. S. Martin WTU-67596 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., IDAHO, CARIBOU COUNTY: U.S.A., MONTANA, FLATHEAD COUNTY: Blackfoot River, near the boundary of the Caribou National Forest. Wininger Slough, 6 miles northeast of Kalispell. T7S R44E S19; NAD 27, uncertainty: 805 m., Source: TRS2LL, Phenology: Fertile. Origin: Native. Georef'd by Ben Legler River. Phenology: Flowers. Origin: Native. H. T. Rogers 1150 1 Aug 1942 William H. Baker 9549 27 Jul 1952 WTU-243501 WTU-295870 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., OREGON, LAKE COUNTY: Southend of Jacobs Reservoir on Guano Creek south of Hart U.S.A., ALASKA, BRISTOL BAY COUNTY: Mountain, Antelope Refuge. Bristol Bay; Kvichak River. Elev. 5700 ft. 58.927378°, -156.972699°; WGS 84, uncertainty: 17552 m., T38S R26E S10 SW1/4; NAD 27, uncertainty: 805 m., Source: Source: Digital Map, Georef'd by Joseph Stormer TRS2LL, Georef'd by Ben Legler In pond on Tundra. Phenology: Vegetative. Origin: Native. A clear, untrampled eleocharis-rimmed lake rimmed with basalt lava and surrounded by low-sagebrush flats. Submersed near outlet, George Neville Jones 9237 Aug 1936 abudant. Phenology: Fertile. Origin: Native. WTU-40382 Barbara Ertter 4378 4 Jul 1981 WTU-286655 Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogetonaceae U.S.A., IDAHO, BONNER COUNTY: Potamogeton richardsonii (A. Benn.) Rydb. Kalispell Bay, Priest Lake. 48.56389°, -116.92444°; WGS 84, uncertainty: 10000 m., Source: U.S.A., OREGON, BENTON COUNTY: GeoLocate, Georef'd by WTU Staff Upper lake, south slope of Coffin Butte, west of Route 99W, 10 miles Open, herbaceous, lake water 5 dm deep. Submerged. Phenology: north of Corvallis. Flowers. Origin: Native. Lake. Submersed, at surface of water, Fr. green. Phenology: Flowers. Origin: Native. R. F. Daubenmire 44438 8 Sep 1944 Albert N. Steward 6225 5 Oct 1952 WTU-262742 WTU-155522 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., IDAHO, BENEWAH COUNTY: Benewah Lake, 3 miles west of Saint Maries. U.S.A., OREGON, GRANT COUNTY: 47.314422°, -116.625723°; WGS 84, uncertainty: 1000 m., Shallows of Strawberry Lake, Blue Mountains. Source: GeoLocate, Georef'd by WTU Staff Elev. 7642 ft. Grassy wooded shores. Phenology: Flowers. Origin: Native. Shallow of a lake. Phenology: Vegetative. Origin: Native. William H. Baker 16475 19 Jul 1963 W. C. Cusick 3620 8 Sep 1910 WTU-264865 WTU-144576

Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., MONTANA, MADISON COUNTY: U.S.A., OREGON, GRANT COUNTY: Ulrey Lake, ca. 24 miles east of Ennis. Shallows of Strawberry Lake. Lake. Growing in about 3 feet of water. Phenology: Flowers. Origin: Shallows of a Lake. Phenology: Vegetative. Origin: Native. Native. W. C. Cusick 3620 9 Sep 1910 C. L. Hitchcock 16764 24 Jul 1947 WTU-116196 WTU-114119 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton robbinsii Oakes U.S.A., OREGON, CURRY COUNTY: U.S.A., WASHINGTON, KING COUNTY: Near the mouth of Rogue River. West side of Lake Sammamish. Phenology: Vegetative. Origin: Native. 47.64194°, -122.07917°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff J. William Thompson 465 18 Aug 1925 Phenology: Fertile. Origin: Native. WTU-24566JWT I. C. Otis 1745 11 Aug 1933 WTU-24573JWT Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogetonaceae U.S.A., OREGON, BAKER COUNTY: Potamogeton robbinsii Oakes Five miles east of Unity. Plants floating, some in water over 6 feet deep, stipules not connate. U.S.A., WASHINGTON, PIERCE COUNTY: Phenology: Vegetative. Origin: Native. Ohop Lake, north of Eatonville at fishing area at south end of lake. 46.8675°, -122.26528°; WGS 84, uncertainty: 10000 m., Source: C. L. Hitchcock 23797 4 Jul 1965 GeoLocate, Georef'd by WTU Staff with R. Spellenberg, D. Sutherland Lake, mud. Less than 2 feet of water, rooted in mud. Phenology: Vegetative. Origin: Native. WTU-223273 R. Spellenberg 1214 24 Jul 1965 with David Sutherland Potamogetonaceae WTU-222877 Potamogeton robbinsii Oakes U.S.A., WASHINGTON, FERRY COUNTY: Potamogetonaceae Sample B, North Bay, Depth 1+ meters. 48.26261°, -118.38557°; WGS 84, uncertainty: 10000 m., Source: Potamogeton robbinsii Oakes GeoLocate, Georef'd by WTU Staff Associated: Brasenia schoeberi, Heteranthera dubia, Chara U.S.A., WASHINGTON, MASON COUNTY: globularis. Phenology: Vegetative. Origin: Native. Lake Cushman. 47.42167°, -123.22167°; WGS 84, uncertainty: 10000 m., Source: Jonna Ahl s.n. 27 Jul 1983 GeoLocate, Georef'd by WTU Staff with Judy Loescher Shallow water. Phenology: Flowers. Origin: Native. WTU-352286 H. St. John 5161 21 Aug 1925 with C. Schweinfurth Potamogetonaceae WTU-99290 Potamogeton robbinsii Oakes Potamogetonaceae U.S.A., WASHINGTON, CLALLAM COUNTY: About 15 miles south of Sekiu. Potamogeton robbinsii Oakes 48.045405°, -124.3°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, STEVENS COUNTY: Small lake. Growing in about 3 feet of water. Phenology: Flowers. Lake Thomas. Origin: Native. 48.62774°, -117.53941°; WGS 84, uncertainty: 1500 m., Source: GeoLocate, Georef'd by WTU Staff C. L. Hitchcock 24068 27 Jul 1965 Phenology: Vegetative. Origin: Native. WTU-224596 Earle F. Layser 1755 Aug 1971 WTU-266103 Potamogetonaceae Potamogeton robbinsii Oakes Potamogetonaceae U.S.A., WASHINGTON, CHELAN COUNTY: Potamogeton robbinsii Oakes Upper Twin Lake. Elev. 2825 ft. U.S.A., WASHINGTON, THURSTON COUNTY: T28N R16E S27 NE1/4; WGS84, uncertainty: 800 m., Source: In Black River near Gate. GeoLocate, Georef'd by WTU Staff 46.841321°, -123.135661°; WGS 84, uncertainty: 5000 m., Growing in 2-3 feet of water. Phenology: Fertile. Origin: Native. Source: GeoLocate, Georef'd by WTU Staff Phenology: Flowers. Origin: Native. E. Burnett 759 7 Oct 1993 A. S. Foster s.n. 20 Oct 1911 WTU-331024 WTU-24571JWT Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: Lake Sammamish. McGinnis Lake, 4 miles east of Columbia River, about 6 miles 47.6°, -122.084722°; NAD 27, uncertainty: 10000 m., Source: southwest of Belvedere, site C, north shore, bay near east end, Georeferenced, Georef'd by WTU Staff sample 45, depth 3 meters. Phenology: Fertile. Origin: Native. Elev. 1500 ft. T29N R31E S2; WGS 84, uncertainty: 800 m., Source: I. C. Otis 1679 11 Aug 1929 GeoLocate, Georef'd by WTU Staff Phenology: Vegetative. Origin: Native. WTU-28617 Jonna Ahl s.n. 21 Jul 1983 with Judy Loescher Potamogetonaceae WTU-352285 Potamogeton robbinsii Oakes U.S.A., WASHINGTON, KING COUNTY: Potamogetonaceae West side of Lake Sammamish. 47.64194°, -122.07917°; WGS 84, uncertainty: 10000 m., Source: Potamogeton illinoensis Morong GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. CANADA, BRITISH COLUMBIA: Blackwater Lake, about 32 miles north of Golden. I. C. Otis 1745 11 Aug 1933 Elev. 2150 ft. 51.623437°, -117.406929°; uncertainty: 1000 m. WTU-28887 Inflorescence emergent from water; rest entirely submerged. Phenology: Fertile. Origin: Native. Potamogetonaceae C. L. Hitchcock 7646 11 Jul 1941 with J. S. Martin Potamogeton robbinsii Oakes WTU-68070 U.S.A., WASHINGTON, KING COUNTY: Lake Sammamish. 47.64194°, -122.07917°; WGS 84, uncertainty: 10000 m., Source: Potamogetonaceae GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Potamogeton illinoensis Morong I. C. Otis 1679 11 Apr 1929 CANADA, BRITISH COLUMBIA: Outlet of Seton Lake. WTU-24572JWT Phenology: Fertile. Origin: Native. J. William Thompson 636 28 Jul 1938 Potamogetonaceae with Emily M. Thompson Potamogeton robbinsii Oakes WTU-17962JWT U.S.A., OREGON, GRANT COUNTY: Strawberry Lake, Blue Mountains. Potamogetonaceae Elev. 7642 ft. Phenology: Vegetative. Origin: Native. Potamogeton natans L. W. C. Cusick 3622 8 Sep 1910 CANADA, BRITISH COLUMBIA: Vancouver Island; lower Kennedy River. WTU-123915 49° 7' N, 125° 39' W In 3 feet of water along edge of river bank. Phenology: Vegetative. Origin: Native. Potamogetonaceae J. H. Soper 12093 22 Jun 1969 Potamogeton robbinsii Oakes with T. C. Brayshaw U.S.A., OREGON, GRANT COUNTY: WTU-263265 Strawberry Lake, Blue Mountains. Elev. 7642 ft. Phenology: Vegetative. Origin: Native. W. C. Cusick 3622 8 Sep 1910 WTU-144575 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. CANADA, BRITISH COLUMBIA: CANADA, BRITISH COLUMBIA: Queen Charlotte Islands. Two miles south of Cape Chroustcheff on Along the Crooked River at it's south junction with Davy Lake, north road to Copper Bay, Moresby Island. of Summit Lake, which is 31 miles north of Prince George. 53.199°, -131.787024°; WGS 84, uncertainty: 750 m., Source: 54.507963°, -122.732507°; WGS 84, uncertainty: 2000 m., Digital Map, Georef'd by Joseph Stormer Source: Digital Map, Georef'd by Debbie Fynn Common in sluggish mucky drainage channels in Myrica - In a still bayon. Phenology: Flowers. Origin: Native. Sphagnum - sedge bog, immediately behind coniferous margined beach. Phenology: Vegetative. Origin: Native. W. A. Weber 2582 1 Aug 1941 J. A. Calder 35372 22 Jun 1964 WTU-74556 with R. L. Taylor WTU-242589 Potamogetonaceae Potamogeton natans L. Potamogetonaceae U.S.A., MONTANA, FLATHEAD COUNTY: Potamogeton natans L. Wininger Slough, 6 miles northeast of Kalispell. Phenology: Vegetative. Origin: Native. U.S.A., IDAHO, BONNER COUNTY: Kalispell Bay, Priest Lake. H. T. Rogers 1150a 1 Aug 1942 48.56389°, -116.92444°; WGS 84, uncertainty: 10000 m., Source: with J. M. Rogers GeoLocate, Georef'd by WTU Staff Lake water 5 decimeters deep. Vegetation zone: arborvitae - WTU-243502 hemlock. Dominant. Submerged. Leaves floating, inflorescences emergent. Phenology: Fertile. Origin: Native. Potamogetonaceae R. F. Daubenmire 44439 8 Sep 1944 Potamogeton natans L. WTU-262782 U.S.A., IDAHO, PAYETTE COUNTY: Six miles north of Payette. Potamogetonaceae 44.07833°, -116.93278°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Potamogeton natans L. Growing in an irrigation canal. Phenology: Fruits. Origin: Native. U.S.A., MONTANA, BEAVERHEAD COUNTY: William H. Baker 7829 8 Jul 1951 Lily pond at head of Wise River. . Phenology: Fertile. Origin: Native. WTU-295843 C. L. Hitchcock 15254 2 Aug 1946 with C. V. Muhlick Potamogetonaceae WTU-107676 Potamogeton natans L. U.S.A., IDAHO, KOOTENAI COUNTY: Potamogetonaceae Coeur d'Alene River, 2 miles west of Cataldo. 47.897688°, -116.506913°; WGS 84, uncertainty: 10000 m., Potamogeton natans L. Source: GeoLocate, Georef'd by WTU Staff On marshy edge of river. Phenology: Fruits. Origin: Native. U.S.A., MONTANA, LAKE COUNTY: Small pot hole about 1 mile southwest of Nine Pipes Reservoir. J. H. Christ 51-334 8 Jul 1951 In about 3 feet of water. Phenology: Fruits. Origin: Native. WTU-294753 C. L. Hitchcock 24017 11 Jul 1965 WTU-224741 Potamogetonaceae Potamogeton pusillus L. Potamogetonaceae U.S.A., MONTANA, MISSOULA COUNTY: Potamogeton natans L. About 6 miles east of Lolo Hot Springs. Small slough; water about 6 feets deep. Stipules connate nearly half CANADA, BRITISH COLUMBIA: their length; glands present at the base of the leaf. Origin: Native. Kootenay District; in large pond about 21 miles north of Cranbrook. Plant in 4 feet of water; emersed leaves linear, nearly terete. C. L. Hitchcock 23978 11 Jul 1965 Phenology: Flowers. Origin: Native. WTU-223580 C. L. Hitchcock 24037 13 Jul 1965 WTU-224119 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton pusillus L. U.S.A., IDAHO, KOOTENAI COUNTY: CANADA, BRITISH COLUMBIA: South end of Medicine Lake, near mouth of creek. Upper Hat Creek, Marble Mountains. 47.46667°, -116.58472°; WGS 84, uncertainty: 10000 m., Source: Elev. 3000 ft. GeoLocate, Georef'd by WTU Staff 50.817329°, -121.577703°; uncertainty: 16000 m. In about 6 feet of water. Phenology: Flowers. Origin: Native. J. William Thompson 513 18 Jul 1938 N. R. Chupp 13 19 Jul 1954 with Emily M. Thompson WTU-295842 WTU-17792JWT

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., OREGON, WALLOWA COUNTY: U.S.A., OREGON COUNTY: Near Duck Lake, 2 miles above Indian Crossing, Imnaha River, Clear Lake. Wallowa Mountains. In slow stream. Phenology: Fruits. Origin: Native. 45.095999°, -117.002128°; WGS 84, uncertainty: 1500 m., Source: GeoLocate, Georef'd by Joseph Stormer Morton E. Peck 15866 25 Jul 1927 In meadowy sedge - bog. Phenology: Flowers. Origin: Native. WTU-24699JWT A. R. Kruckeberg 3169 26 Jul 1952 WTU-156803 Potamogetonaceae Potamogeton berchtoldii Fieber Potamogetonaceae U.S.A., IDAHO, BENEWAH COUNTY: Potamogeton pusillus L. In pond formed by railroad embankment, along northwest side of Lake Chatcolet, 10 miles northeast of Plummer. U.S.A., IDAHO, CUSTER COUNTY: Elev. 2200 ft. Fifteen miles north of Challis. T47N R3W S31; NAD 27, uncertainty: 805 m., Source: TRS2LL, 44.50472°, -114.23083°; WGS 84, uncertainty: 10000 m., Source: Georef'd by Ben Legler GeoLocate, Georef'd by WTU Staff Origin: Native. Roadside ditch, about 2 feets deep. Stipules connate for nearly half their length; glands at base of leaves prominent. Origin: Native. Arthur Cronquist 5959 16 Jul 1949 with Quentin Jones C. L. Hitchcock 23839 6 Jul 1965 with R. Spellenberg, D. Sutherland WTU-169572 WTU-223931 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton foliosus Raf. U.S.A., OREGON, WASHINGTON COUNTY: Stagnant ditch north of Forest Grove. U.S.A., IDAHO, SHOSHONE COUNTY: Phenology: Flowers. Origin: Native. Old beaver-dam near head of West Fork of Saint Maries River, 7 miles south west of Clarkia. J. William Thompson 935 27 May 1926 Elev. 3000 ft. T42N R1E S27; WGS 84, uncertainty: 5000 m., Source: WTU-24569JWT GeoLocate, Georef'd by WTU Staff Shallow water. Origin: Native. Potamogetonaceae Arthur Cronquist 6038 6 Aug 1949 with Quentin Jones Potamogeton berchtoldii Fieber WTU-169573 U.S.A., OREGON, BAKER COUNTY: [locality and coordinates withheld; status in Oregon: S3? (Rare?; OBIC)] Potamogetonaceae About 12 inches of water. Origin: Native. Potamogeton natans L. C. L. Hitchcock 19691 15 Jul 1952 U.S.A., OREGON, DESCHUTES COUNTY: WTU-149783 Thirty three miles south of Bend. Shallow water in meadow. Locally common. Phenology: Flowers. Origin: Native. Bassett Maguire 26483 19 Jun 1946 with Arthur H. Holmgren WTU-111654 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton pusillus L. U.S.A., IDAHO, GEM COUNTY: U.S.A., MONTANA, LAKE COUNTY: Montour Wildlife area. Large "pot hole" 0.2 miles southeast of Nine-Pipes Reservoir. Elev. 2624 ft. Plants growing in about 3 feets of water; stem slightly 43° 50' N, 116° 18' W; T7N R1E S21 SE flattened;stipules connate and forming a closed tube; glands present Inflorescence emergent and erect, large leaves floating. Phenology: at base of leaf. Origin: Native. Flowers & Fruits. Origin: Native. C. L. Hitchcock 23980 11 Jul 1965 James F. Smith 2992 2 Jul 1994 with R. Spellenberg, D. Sutherland WTU-331196 WTU-224345

Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton natans L. U.S.A., WASHINGTON, OKANOGAN COUNTY: U.S.A., WASHINGTON, CLALLAM COUNTY: Omak Plateau, above and southeast of Omak; in Rat Lake. Lake Crescent. 48.21444°, -119.35417°; WGS 84, uncertainty: 10000 m., Source: 48.09472°, -123.80583°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Origin: Native. Phenology: Vegetative. Origin: Native. Edmund Broch s.n. 24 Jun 1982 Geo. N. Jones 3595 Aug 1931 WTU-352280 WTU-21369

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton pusillus L. U.S.A., WASHINGTON, PIERCE COUNTY: U.S.A., WASHINGTON, LEWIS COUNTY: Small pond, upper Tahoma Creek, Mount Rainier. Chambers Lake, Goat Rocks Primitive Area. 46.737489°, -121.903173°; WGS 84, uncertainty: 10000 m., Elev. 4000 ft. Source: GeoLocate, Georef'd by WTU Staff 46.46667°, -121.53333°; WGS 84, uncertainty: 10000 m., Source: Shallow water. Phenology: Vegetative. Origin: Native. GeoLocate, Georef'd by WTU Staff Origin: Native. F. A. Warren 1591 24 Jul 1932 J. William Thompson 15188 5 Aug 1940 WTU-37656 WTU-23264JWT Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton natans L. U.S.A., WASHINGTON, OKANOGAN COUNTY: Little Goose Lake, southeast of Omak. U.S.A., OREGON, KLAMATH COUNTY: 48.16972°, -119.34194°; WGS 84, uncertainty: 10000 m., Source: Near Fort Klamath. GeoLocate, Georef'd by WTU Staff Submerged mostly in ditch. Phenology: Fruits. Origin: Native. Growing in water. Origin: Native. J. William Thompson 205 13 Aug 1925 Chas. B. Fiker 1292 26 Jul 1933 WTU-24570JWT WTU-24563JWT Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton natans L. U.S.A., WASHINGTON, THURSTON COUNTY: U.S.A., WASHINGTON, CLALLAM COUNTY: Hicks Lake, 4 miles east of Olympia at edge of lake near Public Lake Crescent. Fishing Area. 48.09472°, -123.80583°; WGS 84, uncertainty: 10000 m., Source: 47.038029°, -122.814476°; WGS 84, uncertainty: 1000 m., GeoLocate, Georef'd by WTU Staff Source: GeoLocate, Georef'd by WTU Staff Floating leaves broad, submerged leaves grasslike, stipules long; In shallow water, mud at edge of lake. Origin: Native. floating leaves subordinate at base. Phenology: Fertile. Origin: Native. C. L. Hitchcock 24121 22 Sep 1965 E. B. Webster 1507 30 Jul 1910 WTU-234027 WTU-30220 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton pusillus L. U.S.A., WASHINGTON, FERRY COUNTY: U.S.A., WASHINGTON, KING COUNTY: Round Lake; 6 miles west of Inchelium; southeast shore. North end of Lake Washington. Elev. 2850 ft. 47.75366°, -122.26139°; WGS 84, uncertainty: 2000 m., Source: T32N R36E S7; NAD 27, uncertainty: 805 m., Source: TRS2LL, GeoLocate, Georef'd by WTU Staff Georef'd by Ben Legler Origin: Native. Depth 0 - 1 meter; with P. pectinatus (both encrusted with calcium carbonate). Phenology: Vegetative. Origin: Native. I. C. Otis 2125 26 Jul 1936 Jonna Ahl s.n. 4 Aug 1983 WTU-51918 with Janet Patton WTU-356387 Potamogetonaceae Potamogeton berchtoldii Fieber Potamogetonaceae U.S.A., WASHINGTON, KING COUNTY: Potamogeton berchtoldii Fieber Lake Sammamish. 47.6°, -122.084722°; NAD 27, uncertainty: 10000 m., Source: U.S.A., WASHINGTON, KING COUNTY: Georeferenced, Georef'd by WTU Staff King Lake Bog, south end of lake. Origin: Native. T24N R8E S3 NW 1/4; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler I. C. Otis 1681 11 Aug 1929 Muddy slough area, very dirty shallow water. Origin: Native. WTU-26603 David Sutherland 1103 22 Jul 1965 WTU-224078 Potamogetonaceae Potamogeton berchtoldii Fieber Potamogetonaceae U.S.A., WASHINGTON, KING COUNTY: Potamogeton foliosus Raf. Seattle. 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., U.S.A., WASHINGTON, KING COUNTY: Source: Digital Map, Georef'd by Joseph Stormer Road to King Lake Bog; ca. 2 miles from gravel road along road wih Origin: Native. center vegetation. On the east side of the road. 47.39361°, -122.42361°; WGS 84, uncertainty: 10000 m., Source: C. V. Piper s.n. 26 Jun 1889 GeoLocate, Georef'd by WTU Staff A swamp; shallow water; with Typha, 3 other Potamogeton sp., WTU-33742 Chara. Very abundant in this area. Origin: Native. David Sutherland 1109 22 Jul 1965 Potamogetonaceae WTU-224007 Potamogeton natans L. U.S.A., WASHINGTON, OKANOGAN COUNTY: Potamogetonaceae Gold Lake; 4 miles west of Okanogon / Ferry county line; narrow "waist" of lake. Potamogeton pusillus L. Elev. 2900 ft. T33N R31E S9 SW 1/4; WGS 84, uncertainty: 10000 m., Source: U.S.A., WASHINGTON, KING COUNTY: GeoLocate, Georef'd by WTU Staff Shallow water in Lake Washington, Mercer Island. Shallow area among deeper pools; depth 0 - 2 meters; associated 47.57083°, -122.22083°; WGS 84, uncertainty: 10000 m., Source: with Nuphar polysepalum, Scirpus subterminalis. Phenology: GeoLocate, Georef'd by WTU Staff Vegetative. Origin: Native. Phenology: Fruits. Origin: Native. Jonna Ahl s.n. 8 Aug 1983 J. William Thompson 7591 24 Jul 1931 with Janet Patton WTU-24564JWT WTU-352235

Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton berchtoldii Fieber U.S.A., WASHINGTON, THURSTON COUNTY: CANADA, BRITISH COLUMBIA: Summit Lake. Kootenay District; in large pond about 21 miles north of Cranbrook. 47.05333°, -123.12167°; WGS 84, uncertainty: 10000 m., Source: Plants with terete stems; glands evident at base of leaves. GeoLocate, Georef'd by WTU Staff Origin: Native. C. L. Hitchcock 24039 13 Jul 1965 Trevor Kincaid s.n. 21 Jul 1934 WTU-224748 WTU-25275 Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton berchtoldii Fieber U.S.A., MONTANA, LAKE COUNTY: U.S.A., WASHINGTON, KING COUNTY: 1 mile south of Nine-Pipes Reservoir. Otter Lake, Maple Valley region. In large "pot-hole" surrounded by Typha, water about 3 feets deep; 47.40667°, -122.0375°; WGS 84, uncertainty: 10000 m., Source: associated with Potamogeton zosteriformis. Nodal glands present; GeoLocate, Georef'd by WTU Staff stipules not connate. Origin: Native. Origin: Native. C. L. Hitchcock 23997 11 Jul 1965 Trevor Kincaid s.n. 30 Jun 1934 WTU-224742 WTU-25276

Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton berchtoldii Fieber U.S.A., IDAHO, OWYHEE COUNTY: U.S.A., MONTANA, MISSOULA COUNTY: Duck Valley Marsh, Riddle. Near Fort Missoula. 42.18694°, -116.10944°; WGS 84, uncertainty: 10000 m., Source: Slough; water about 3 feets deep. Stems terete; nodal glands GeoLocate, Georef'd by WTU Staff conspicuous. Origin: Native. A slough. Frequent. Origin: Native. C. L. Hitchcock 23968 11 Jul 1965 William H. Baker 8459 10 Aug 1951 WTU-223390 WTU-295661 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON COUNTY: U.S.A., WASHINGTON, PIERCE COUNTY: Seq. Lake [Sequallitchew Lake? No state or country on label]. Muddy Lakes, near Tacoma. Phenology: Fertile. Origin: Native. 47.25306°, -122.44306°; WGS 84, uncertainty: 5000 m., Source: GeoLocate, Georef'd by WTU Staff J. B. Flett s.n. 6 Jun 1903 Phenology: Fruits. Origin: Native. WTU-36871 J. B. Flett 2147 7 Aug 1903 WTU-36472 Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae U.S.A., OREGON, WHEELER COUNTY: Potamogeton berchtoldii Fieber 15 miles east of Mitchell spikes of flower above water. Deep roadside pond. Sheaths closed; plants rooted in mud from 1 U.S.A., OREGON COUNTY: dm. to over 4 dm. below water surface; glands at nodes evident; [locality and coordinates withheld; status in Oregon: S3? (Rare?; stipules not connate. Phenology: Fruits. Origin: Native. OBIC)] Origin: Native. C. L. Hitchcock 23779 3 Jul 1965 with R. Spellenberg, D. Sutherland T. Kincaid s.n. 16 Jul 1935 WTU-223272 WTU-34803 Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton natans L. U.S.A., MONTANA, BEAVERHEAD COUNTY: U.S.A., WASHINGTON, PIERCE COUNTY: One mile southeast of Pintlar Lake; Anaconda Range. Tacoma. Small pond about 1 feet of water. Origin: Native. 47.25306°, -122.44306°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff C. L. Hitchcock 12781 27 Jul 1945 Phenology: Fruits. Origin: Native. with C. V. Muhlick J. B. Flett s.n. 10 Jul 1896 WTU-100723 WTU-36899 Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton natans L. U.S.A., OREGON, MALHEUR COUNTY: U.S.A., WASHINGTON, WHITMAN COUNTY: [locality and coordinates withheld; status in Oregon: S3? (Rare?; At a lake 3 miles northwest of Ewan. OBIC)] 47.147639°, -117.779015°; WGS 84, uncertainty: 1000 m., Pond formed of waste irrigation water; bottom muddy; pasture at Source: GeoLocate, Georef'd by WTU Staff margins of pond; pond established April 1953. Floatin, abundant in In water. Phenology: Vegetative. Origin: Native. water 3 feets or more. Origin: Native. F. L. Pickett 1659 18 Aug 1934 Quentin D. Clarkson 276 2 Sep 1953 WTU-66035 WTU-155538 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, KLICKITAT COUNTY: Pond by highway Forks to Bagachiel River. Falcon Valley. 47.95056°, -124.38417°; WGS 84, uncertainty: 10000 m., Source: 45.977122°, -121.306515°; WGS 84, uncertainty: 8021 m., GeoLocate, Georef'd by WTU Staff Source: Digital Map, Georef'd by Sara Legler Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. I. C. Otis 1565 13 Aug 1927 Wilhelm N. Suksdorf s.n. 17 Jul 1886 WTU-24710JWT WTU-117874 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, KING COUNTY: Pond by highway Forks to Bagachiel River. Wittenmeyer's Lake [Totem Lake]. 47.95056°, -124.38417°; WGS 84, uncertainty: 10000 m., Source: 47.71098°, -122.17558°; WGS 84, uncertainty: 500 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Phenology: Fruits. Origin: Native. I. C. Otis 1565 13 Aug 1927 Trevor Kincaid s.n. 20 Jul 1934 WTU-24694JWT WTU-25286 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON, JEFFERSON COUNTY: U.S.A., WASHINGTON, KING COUNTY: Pond by highway, Forks to Bogachiel River. Seattle. 47.879511°, -124.241618°; WGS 84, uncertainty: 10000 m., 47.613617°, -122.310098°; WGS 84, uncertainty: 15750 m., Source: GeoLocate, Georef'd by WTU Staff Source: Digital Map, Georef'd by Joseph Stormer Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. I. C. Otis 1565 13 Aug 1927 C. V. Piper s.n. 26 Jun 1889 WTU-28300 WTU-33743 Potamogetonaceae Potamogetonaceae Potamogeton friesii Rupr. Potamogeton natans L. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, PIERCE COUNTY: Lake Erie. Segualiche [Sequalitchew] Lake. 48.45279°, -122.6407°; WGS 84, uncertainty: 1000 m., Source: 47.11196°, -122.6061°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff GeoLocate, Georef'd by WTU Staff Phenology: Fertile. Origin: Native. Phenology: Fertile. Origin: Native. Trevor Kincaid s.n. 6 Sep 1934 C. V. Piper s.n. 27 May 1888 WTU-358304 WTU-33744 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, ISLAND COUNTY: Big Lake. Granberry Lake, Whidbey Island. 48.40306°, -122.24°; WGS 84, uncertainty: 10000 m., Source: Phenology: Fertile. Origin: Native. GeoLocate, Georef'd by WTU Staff Phenology: Flowers. Origin: Native. Trevor Kincaid s.n. 20 Sep 1934 Trevor Kincaid s.n. 18 Jul 1934 WTU-358314 WTU-358309 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton epihydrus Raf. U.S.A., WASHINGTON, ISLAND COUNTY: Cranberry Lake, Deception Pass State Park, Whidbey Island. U.S.A., WASHINGTON, KING COUNTY: 48.14389°, -122.49111°; WGS 84, uncertainty: 10000 m., Source: Mud Lake, Maple Valley region. GeoLocate, Georef'd by WTU Staff 47.40667°, -122.0375°; WGS 84, uncertainty: 10000 m., Source: Phenology: Flowers & Fruits. Origin: Unknown. GeoLocate, Georef'd by WTU Staff Phenology: Flowers. Origin: Native. Harold W. Smith 1286 6 Jul 1936 Trevor Kincaid s.n. 30 Jun 1934 WTU-38900 WTU-358310 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton gramineus L. U.S.A., WASHINGTON, PACIFIC COUNTY: Northwest shore of Loomis Lake, boat launch. U.S.A., WASHINGTON, ISLAND COUNTY: Elev. 16 ft. Granberry Lake, Whidbey Island. T11N R11W S16S NW1/4; NAD 27, uncertainty: 805 m., Source: Phenology: Fertile. Origin: Native. TRS2LL, Georef'd by Ben Legler Common with Egeria, Elodea, Spirodella, Myriophyllum, Trevor Kincaid s.n. 20 Sep 1934 Potamogeton richardsonii. Phenology: Fertile. Origin: Unknown. WTU-358311 P. F. Zika 14227 31 Aug 1999 WTU-339706 Potamogetonaceae Potamogeton praelongus Wulfen Potamogetonaceae U.S.A., WASHINGTON, SKAGIT COUNTY: Potamogeton zosteriformis Fernald Big Lake. 48.40306°, -122.24°; WGS 84, uncertainty: 10000 m., Source: U.S.A., WASHINGTON, OKANOGAN COUNTY: GeoLocate, Georef'd by WTU Staff Little Goose Lake, southeast of Omak. Phenology: Vegetative. Origin: Native. 48.16972°, -119.34194°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Trevor Kincaid s.n. 14 Jul 1934 Phenology: Fruits. Origin: Unknown. WTU-358312 Chas. B. Fiker 1290 26 Jul 1933 WTU-18592JWT Potamogetonaceae Potamogeton amplifolius Tuck. Potamogetonaceae U.S.A., WASHINGTON, THURSTON COUNTY: Potamogeton zosteriformis Fernald Lake Lois. 47.04121°, -122.79747°; WGS 84, uncertainty: 500 m., Source: U.S.A., WASHINGTON, PIERCE COUNTY: GeoLocate, Georef'd by WTU Staff Ohop Lake, north end of Eatonville at fishing area at south end of Phenology: Fertile. Origin: Native. lake, in 3-4 feet of water. 46.8675°, -122.26528°; WGS 84, uncertainty: 10000 m., Source: Trevor Kincaid s.n. 7 Oct 1934 GeoLocate, Georef'd by WTU Staff Growing with Elodea. Phenology: Fertile. Origin: Unknown. WTU-358313 Richard Spellenberg 1215 24 Jul 1965 with David Sutherland WTU-224375 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: Concrete, 4 miles northwest of Grandy Lake. Cascade Lake, Orcas Island, east side of lake, near public Elev. 800 ft. swimming area. 48.606747°, -121.860746°; WGS 84, uncertainty: 1000 m., 48.6525°, -122.851389°; WGS 84, uncertainty: 600 m., Source: Source: GeoLocate, Georef'd by WTU Staff Georeferenced, Georef'd by WTU Staff Submerged in 9 dm. of water of muddy bottom lake. Phenology: In depths to over 20(estimate) feet, growing with Potamogetoa Vegetative. Origin: Unknown. richardsonii and amplifolius. Common in this and other island lakes. Many plants washed ashore. Phenology: Fertile. Origin: Unknown. R. Naas 2079 8 Sep 1972 with D. Naas Scott R. Atkinson 464 17 Aug 1992 WTU-327213 WTU-325109

Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., WASHINGTON, WHATCOM COUNTY: Orcas Island, northwest shore of Cascade Lake. Tennant Lake, shallow inlet. Elev. 346 ft. 48.83278°, -122.57694°; WGS 84, uncertainty: 10000 m., Source: T37N R1W S31 NE; WGS 84, uncertainty: 600 m., Source: GeoLocate, Georef'd by WTU Staff Georeferenced, Georef'd by WTU Staff Shallow inlet. Phenology: Vegetative. Origin: Unknown. Growing with P. pectinatus, P. pusillus, P. amplifolius. Phenology: Vegetative. Origin: Unknown. W. C. Muenscher 10168 6 Jul 1939 P. F. Zika 14153 28 Aug 1999 WTU-55318 WTU-342066 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, SAN JUAN COUNTY: Sportsmans Lake; San Juan Islands. U.S.A., WASHINGTON, THURSTON COUNTY: 48.568056°, -123.072778°; WGS 84, uncertainty: 500 m., Source: Pattison Lake, about 8 miles southeast of Olympia, Humid Transition Georeferenced, Georef'd by WTU Staff Zone. Deep water. Phenology: Vegetative. Origin: Unknown. 46.956108°, -122.779282°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff Morton E. Peck 13035 21 Jul 1923 Aquatic in lake. Phenology: Fertile. Origin: Unknown. WTU-24557JWT Fred G. Meyer 653 26 Jul 1936 WTU-9171JWT Potamogetonaceae Potamogeton zosteriformis Fernald Potamogetonaceae U.S.A., MONTANA, LAKE COUNTY: Potamogeton zosteriformis Fernald 1 mile south of Nine-Pipes Reservoir, in large pot hole. In water about 3 feet deep, surrounded by Typha. Stems greatly U.S.A., WASHINGTON, WHITMAN COUNTY: flattened, up to 2 meters long, leaves all alike, linear. Phenology: 3 miles N of outlet of Rock Lake. Fertile. Origin: Unknown. 47.227867°, -117.68111°; WGS 84, uncertainty: 5000 m., Source: GeoLocate, Georef'd by WTU Staff C. L. Hitchcock 23992 11 Jul 1965 Pond. Phenology: Fertile. Origin: Unknown. WTU-224117 C. F. Yocom s.n. 19 Aug 1947 WTU-132704 Potamogetonaceae Potamogeton zosteriformis Fernald Potamogetonaceae U.S.A., IDAHO, BENEWAH COUNTY: Potamogeton zosteriformis Fernald Benewah Lake, 3 miles west of Saint Maries. 47.314422°, -116.625723°; WGS 84, uncertainty: 1000 m., U.S.A., WASHINGTON, WHATCOM COUNTY: Source: GeoLocate, Georef'd by WTU Staff Wiser Lake boat launching area east of the north end of the fill which Grassy wooded shores. Phenology: Fertile. Origin: Unknown. crosses the lake. 48.90389°, -122.48°; WGS 84, uncertainty: 10000 m., Source: William H. Baker 16477 19 Jul 1963 GeoLocate, Georef'd by WTU Staff In 4 feet of water. Stems flattened. Phenology: Fertile. Origin: WTU-264870 Unknown. David Sutherland 1081 15 Jul 1965 WTU-224004 Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton zosteriformis Fernald CANADA, BRITISH COLUMBIA: U.S.A., WASHINGTON, KING COUNTY: Cowichan Lake, Vancouver Island. Wittenmeyer's Lake [Totem Lake]. Phenology: Vegetative. Origin: Unknown. 47.71098°, -122.17558°; WGS 84, uncertainty: 500 m., Source: GeoLocate, Georef'd by WTU Staff Trevor Kincaid s.n. 7 Sep 1934 Phenology: Flowers. Origin: Unknown. WTU-358476 Trevor Kincaid s.n. 22 Jul 1934 WTU-358574 Potamogetonaceae Potamogeton robbinsii Oakes Potamogetonaceae U.S.A., WASHINGTON, THURSTON COUNTY: Potamogeton zosteriformis Fernald Summit Lake. 47.05333°, -123.12167°; WGS 84, uncertainty: 10000 m., Source: U.S.A., WASHINGTON, SKAGIT COUNTY: GeoLocate, Georef'd by WTU Staff Big Lake. Phenology: Vegetative. Origin: Native. 48.40306°, -122.24°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Trevor Kincaid s.n. 4 Jul 1934 Phenology: Vegetative. Origin: Unknown. WTU-358477 Trevor Kincaid s.n. 18 Jul 1934 WTU-358573 Potamogetonaceae Potamogeton robbinsii Oakes Potamogetonaceae U.S.A., WASHINGTON, THURSTON COUNTY: Potamogeton zosteriformis Fernald Lawrence Lake. 46.85259°, -122.57026°; WGS 84, uncertainty: 1000 m., Source: U.S.A., WASHINGTON, ISLAND COUNTY: GeoLocate, Georef'd by WTU Staff Granberry Lake, Whidbey Island. Phenology: Vegetative. Origin: Native. Phenology: Fertile. Origin: Unknown. Trevor Kincaid s.n. 24 Feb 1934 Trevor Kincaid s.n. 20 Sep 1934 WTU-358478 WTU-358572

Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton epihydrus Raf. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, KING COUNTY: Big Lake. Cedar River Watershed. Walsh Lake. 48.40306°, -122.24°; WGS 84, uncertainty: 10000 m., Source: Elev. 725 ft. GeoLocate, Georef'd by WTU Staff 47° 24.7' N, 121° 55.8' W Phenology: Fertile. Origin: Native. Lake, shorline, and wetlands. Phenology: Fruits. Origin: Native. Trevor Kincaid s.n. 18 Jul 1934 P. F. Zika 17610 24 Aug 2002 with Bob Antieau WTU-358479 WTU-364534 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, KING COUNTY: Wittenmeyer's Lake [Totem Lake]. U.S.A., WASHINGTON, KING COUNTY: 47.71098°, -122.17558°; WGS 84, uncertainty: 500 m., Source: Cedar River Watershed. Walsh Lake. GeoLocate, Georef'd by WTU Staff Elev. 725 ft. Phenology: Flowers. Origin: Unknown. 47° 24.7' N, 121° 55.8' W Lake, shorline, and wetlands. Found in south end of lake; aquatic; Trevor Kincaid s.n. 20 Jul 1934 stem flattened. Phenology: Vegetative. Origin: Native. WTU-358575 P. F. Zika 17645 24 Aug 2002 with Bob Antieau WTU-362717 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton nodosus Poir. U.S.A., WASHINGTON, YAKIMA COUNTY: U.S.A., WASHINGTON, JEFFERSON COUNTY: Yakima Training Center; Taylor Pond, Cold Creek Valley, Training Northwest shores of Crocker Lake, 0.5 meters. Area 11B. Elev. 196 ft. Elev. 2400 ft. 47° 56.2' N, 122° 53' W; T28N R2W S12 716000E, 5168000N; WGS 84, uncertainty: 2000 m., Source: Uncommon submerged aquatic, with Elodea canadensis, algae, GeoLocate, Georef'd by WTU Staff Nuphar. Phenology: Fruits. Origin: Native. In shallow water (circa 1-2 feeet deep). Completely submerged. Phenology: Vegetative. Origin: Native. P. F. Zika 20177 9 Sep 2004 with F. Weinmann Joy Mastrogiuseppe 5933 16 May 1991 with Calvin Bagley WTU-359748 WTU-358620 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, KITTITAS COUNTY: Near fish screen in West Side Irrigation Canal. U.S.A., NEVADA, ELKO COUNTY: Elev. 1685 ft. Duck Valley Indian Reservation, reservoir 4.6 road miles west of 47° 5.715' N, 120° 42.309' W; T19N R17E S34 Sheep Creek Reservoir road on Bob Johnson Road past Hat Peak. Rather deep flowing water. Other plants: Elodea candensis, Elev. 5400 ft. Ranunculus aquatilis, Populus trichocarpa, Prunus virginiana. 41° 54' 6.3" N, 116° 16' 20.1" W; T46N R51E S8 Common. Phenology: Fertile. Origin: Native. Forming colonies in the reseroir, all leaves submerged. WGS-1984. Phenology: Fruits. Don Knoke 739 23 Sep 2004 Arnold Tiehm 14584 27 Jun 2004 WTU-360115 WTU-359486 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, WHITMAN COUNTY: Palouse River, Pullman. U.S.A., WASHINGTON, JEFFERSON COUNTY: 46.909144°, -117.074576°; WGS 84, uncertainty: 10000 m., Northwest shores of Crocker Lake. Source: GeoLocate, Georef'd by WTU Staff Elev. 196 ft. Pools left by the nearly dry river. Cited by Piper, Fl. Wash., page 97. 47° 56.2' N, 122° 53' W; T28N R2W S12 Phenology: Flowers & Fruits. Origin: Native. Associated with Elodea canadensis, algae, Nuphar. Occasional submerged aquatic, 0.5-1.5 meters water. Tissue removed for Louis F. Henderson s.n. 17 Jul 1892 environmental DNA analysis studies by Lauren Kuehne at University of Washington July 2018 Phenology: WTU-38749 Fertile. Origin: Native. P. F. Zika 20176 9 Sep 2004 Potamogetonaceae with F. Weinmann Potamogeton epihydrus Raf. WTU-359714 U.S.A., WASHINGTON, THURSTON COUNTY: Chambers Lake. Potamogetonaceae 47.02583°, -122.83806°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Potamogeton epihydrus Raf. Ditch. Common in Western Washington. Phenology: Flowers & Fruits. Origin: Native. U.S.A., WASHINGTON, JEFFERSON COUNTY: Northwest shores of Crocker Lake, 0.5 meters. Louis F. Henderson s.n. 23 Aug 1892 Elev. 196 ft. 47° 56.2' N, 122° 53' W; T28N R2W S12 WTU-33748 Uncommon submerged aquatic, with Elodea canadensis, algae, Nuphar. Phenology: Fertile. Origin: Native. Potamogetonaceae P. F. Zika 20175 9 Sep 2004 with F. Weinmann Potamogeton foliosus Raf. WTU-359747 U.S.A., WASHINGTON, YAKIMA COUNTY: In the Ahtanum River; near its confluence with the Yakima River; Old Town Yakima. 46.590249°, -120.462074°; WGS 84, uncertainty: 10000 m., Source: GeoLocate, Georef'd by WTU Staff Phenology: Flowers. Origin: Native. Louis F. Henderson s.n. 19 Jun 1892 WTU-33739 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, WHITMAN COUNTY: U.S.A., WASHINGTON, WHATCOM COUNTY: Union Flat. Silver Lake, 9 miles southeast of Sumas; on south and southeast 46.85148°, -117.92188°; WGS 84, uncertainty: 5000 m., Source: ends of lake. GeoLocate, Georef'd by WTU Staff Elev. 770 ft. Muddy pool. Phenology: Flowers. Origin: Native. 48° 58' 19" N, 122° 4' W; NAD 83 Clear lake water with soft muddy bottom, with abundant and diverse Louis F. Henderson s.n. 18 Jul 1892 aquatic growth in shallows. Leaves wavy-margined, bright green; stems submerged in 1-2 meters of water; frequent. Phenology: WTU-33738 Fruits. Origin: Native. Ben Legler 2286 30 Aug 2004 Potamogetonaceae WTU-382599 Potamogeton nodosus Poir. U.S.A., WASHINGTON, SPOKANE COUNTY: Potamogetonaceae Silver Lake. 47.55972°, -117.65333°; WGS 84, uncertainty: 1000 m., Source: Potamogeton zosteriformis Fernald GeoLocate, Georef'd by WTU Staff In 3 feet of water. Phenology: Flowers & Fruits. Origin: Native. U.S.A., WASHINGTON, WHATCOM COUNTY: Silver Lake, 9 miles southeast of Sumas; on south and southeast Louis F. Henderson s.n. 13 Jul 1892 ends of lake. Elev. 770 ft. WTU-33751 48° 58' 19" N, 122° 4' W; NAD 83 Clear water, soft muddy bottom, with abundant aquatic growth in shallows. Stems strongly flattened; uncommon in 1-2 meters of Potamogetonaceae water. Phenology: Vegetative. Origin: Native. Potamogeton gramineus L. Ben Legler 2287 30 Aug 2004 U.S.A., WASHINGTON, SNOHOMISH COUNTY: WTU-382365 Myrtle Lake, along South Fork Sauk River 2 miles north-northeast of Barlow Pass. Elev. 1980 ft. Potamogetonaceae 48° 3' 11" N, 121° 25' 36" W Shallow muddy margin of lake, under Tsuga heterophylla. Leaves all Potamogeton foliosus Raf. submerged in shallow water. Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, YAKIMA COUNTY: Ben Legler 1408 5 Sep 2003 Along Hwy 410 0.4 road miles southeast of junction with Little Naches River Road (FS Rd 19), on east side of highway at a small WTU-362332 oxbow pond. Elev. 2550 ft. 46° 59' 6" N, 121° 5' 28" W; WGS 84 Potamogetonaceae Small pond in oxbow of adjacent river now isolated from river by highway; shaded by basalt cliff; muddy soil with Salix, Cornus Potamogeton amplifolius Tuck. sericea, Juncus. Forming mats just beneath water surface in pond; all sterile. Phenology: Vegetative. Origin: Native. U.S.A., WASHINGTON, WHATCOM COUNTY: Silver Lake, 9 miles southeast of Sumas; on south and southeast Ben Legler 2974 21 Aug 2005 ends of lake. Elev. 770 ft. WTU-383185 48° 58' 19" N, 122° 4' W; NAD 83 Clear lake water with soft muddy bottom, with abundant and diverse aquatic growth in shallows. Leaves dimorphic, both floating and Potamogetonaceae submerged; plants abundant in 1-2 meters of water. Phenology: Flowers & Fruits. Origin: Native. Potamogeton praelongus Wulfen Ben Legler 2285 30 Aug 2004 U.S.A., WASHINGTON, SKAGIT COUNTY: Grandy Lake, along Baker Lake Road 4 miles NE of junction with WTU-382600 Hwy 20. Elev. 623 ft. 48° 33.937' N, 121° 48.286' W; WGS 84, uncertainty: 8 m. Shallow lake with soft bottom, marshy vegetation around edge, and cold clear spring on north end; surrounded by conifer forest. Stipules fibrous; leaves all submerged, wavy-margined. Phenology: Vegetative. Origin: Native. Ben Legler 2318 3 Sep 2004 with David Giblin, Tad Dilhoff WTU-364583 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton gramineus L. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, SNOHOMISH COUNTY: Grandy Lake, along Baker Lake Road 4 miles NE of junction with Sunday Lake, located about one kilometer south of State Highway Hwy 20. 532. Elev. 623 ft. 48° 13' N, 122° 15' W; WGS 84 48° 33.937' N, 121° 48.286' W; WGS 84, uncertainty: 8 m. Kettle hole pond about two hectares in size; surrounded by Typha Shallow lake with soft bottom, marshy vegetation around edge, and latifolia on the shore and Nymphaea odorata in the shallow water at cold clear spring on north end; surrounded by conifer forest. Leaves the edge. Elliptical floating leaves; linear underwater leaves; all all submerged; plants forming dense patches on bottom of 1 meter plants sterile; common. Phenology: Vegetative. Origin: Native. deep water. Phenology: Fruits. Origin: Native. David Giblin 274 23 Sep 2005 Ben Legler 2320 3 Sep 2004 with Ben Legler with David Giblin, Tad Dilhoff WTU-364322 WTU-364582 Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, SNOHOMISH COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: Sunday Lake, located about one kilometer south of State Highway Grandy Lake, along Baker Lake Road 4 miles NE of junction with 532. Hwy 20. 48° 13' N, 122° 15' W; WGS 84 Elev. 623 ft. Kettle hole pond about two hectares in size; surrounded by Typha 48° 33.937' N, 121° 48.286' W; WGS 84, uncertainty: 8 m. latifolia on the shore and Nymphaea odorata in the shallow water at Shallow lake with soft bottom, marshy vegetation around edge, and the edge. Underwater leaves only; leaves narrowly linear. Common cold clear spring on north end; surrounded by conifer forest. Stems among Nuphar and Nymphaea. Phenology: Fruits. Origin: Native. strongly flattened, wing-margined; common in shallows. Phenology: Vegetative. Origin: Native. David Giblin 275 23 Sep 2005 with Ben Legler Ben Legler 2328 3 Sep 2004 with David Giblin, Tad Dilhoff WTU-364343 WTU-364576 Potamogetonaceae Potamogetonaceae Potamogeton praelongus Wulfen Potamogeton illinoensis Morong U.S.A., WASHINGTON, KING COUNTY: Sawyer Lake. U.S.A., WASHINGTON COUNTY: 47.333° N, 122.0367° W Seq. Lake. Phenology: Vegetative. Origin: Native. Phenology: Flowers. Origin: Native. Del Field s.n. 16 Aug 1994 J. B. Flett s.n. 6 Jun 1909 with Bob Brenner, Kristin Kirby WTU-36479 WTU-363882

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton robbinsii Oakes U.S.A., WASHINGTON, CHELAN COUNTY: U.S.A., WASHINGTON, KING COUNTY: Lake Chelan National Recreation Area. East side of Coon Lake on Sawyer Lake. north side of lake outlet. One kilometer northeast of High Bridge. 47.333° N, 122.0367° W Stehekin River Valley. Phenology: Vegetative. Origin: Native. Elev. 2170 ft. 48° 23' 16.7" N, 120° 49' 43.5" W; UTM Zone 10, 660742.875E, Del Field s.n. 16 Aug 1994 5361700.857N; WGS 84, uncertainty: 8 m., Source: GPS, UTM with Kristin Kirby, Bob Brenner calculated from Lat-Lon. Shady mature Thuja plicata flat. Moist springy duff. Understory WTU-363881 dominated by Athyrium filix-femina. Abundant in 1 to 2 meter deep water around lake outlet. Phenology: Flowers. Origin: Native. Potamogetonaceae Steve Hahn 06-205 29 Jun 2006 Stuckenia pectinata (L.) Borner WTU-366774 U.S.A., WASHINGTON, KING COUNTY: Sawyer Lake. 47.333° N, 122.0367° W Phenology: Vegetative. Origin: Native. Del Field s.n. 16 Aug 1994 with Bob Brenner, Kristin Kirby WTU-363880 Potamogetonaceae Potamogetonaceae Potamogeton illinoensis Morong Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Sawyer Lake. Star Lake. 47.333° N, 122.0367° W 47.3551° N, 122.2875° W Phenology: Fruits. Origin: Native. Origin: Native. Del Field s.n. 16 Aug 1994 Steve Majerick s.n. 22 Aug 1996 with Kristin Kirby, Bob Brenner with Wendy Cooke WTU-363879 WTU-363870

Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Sawyer Lake. Star Lake. 47.333° N, 122.0367° W 47.3551° N, 122.2875° W Phenology: Vegetative. Origin: Native. Origin: Native. Del Field s.n. 16 Aug 1994 Steve Majerick s.n. 5 Aug 1994 with Bob Brenner, Kristin Kirby with Sharon Walton WTU-363878 WTU-363871

Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Sawyer Lake. Star Lake. 47.333° N, 122.0367° W 47.3551° N, 122.2875° W Phenology: Vegetative. Origin: Native. Origin: Native. Del Field s.n. 16 Aug 1994 Steve Majerick s.n. 22 Aug 1996 with Kristin Kirby, Bob Brenner with Wendy Cooke WTU-363877 WTU-363875

Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Shadow Lake. Meridian Lake. 47.4059° N, 122.087° W 47.3631° N, 122.1538° W Origin: Native. Phenology: Vegetative. Origin: Native. Steve Majerick s.n. 23 Aug 1996 Del Field s.n. 1 Aug 1994 with Wendy Cooke with Nicholas Altieri WTU-363866 WTU-363845

Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Shadow Lake. Meridian Lake. 47.4059° N, 122.087° W 47.3631° N, 122.1538° W Origin: Native. Phenology: Vegetative. Origin: Native. Steve Majerick s.n. 23 Aug 1996 Del Field s.n. 1 Aug 1994 with Wendy Cooke with Nicholas Altieri WTU-363867 WTU-363844 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton natans L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, WAHKIAKUM COUNTY: Meridian Lake. East side of Miller Point, north shore of Grays Bay, north side of 47.3631° N, 122.1538° W Columbia River. Phenology: Vegetative. Origin: Native. Elev. 6 ft. 46° 18.3' N, 123° 42' W; T10N R8W S32, 30 Del Field s.n. 1 Aug 1994 Freshwater intertidal marsh, with Deschampsia caespitosa, Phalaris with Nicholas Altieri arundinacea, Typha angustifolia, Boltonia asteroides. Phenology: Vegetative. Origin: Native. WTU-363843 Peter F. Zika 22237 30 Aug 2005 with David Giblin, Cathy Maxwell, Ben Legler Potamogetonaceae WTU-373933 Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: Potamogetonaceae Welcome Lake. 47.7236° N, 122.044° W Potamogeton foliosus Raf. Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, WAHKIAKUM COUNTY: Del Field s.n. 15 Aug 1995 North shore of Grays Bay, Columbia River, 0.5 kilometer northwest with Steve Majerick of Miller Point. Elev. 6 ft. WTU-363850 46° 18.5' N, 123° 42.3' W; T10N R8W S31 Freshwater intertidal marsh, in deep mud, with Lilaeopsis. Bottom of channel; occasional; narrow leaves. Phenology: Flowers. Origin: Potamogetonaceae Native. Potamogeton gramineus L. Peter F. Zika 22239 30 Aug 2005 with David Giblin, Cathy Maxwell, Ben Legler U.S.A., WASHINGTON, KING COUNTY: Welcome Lake. WTU-373945 47.7236° N, 122.044° W Phenology: Fruits. Origin: Native. Potamogetonaceae Del Field s.n. 15 Aug 1995 with Steve Majerick Potamogeton richardsonii (A. Benn.) Rydb. WTU-363849 U.S.A., WASHINGTON, WAHKIAKUM COUNTY: Near and east of mouth of Deep River, north shore of Grays Bay, Columbia River, 0.7 kilometer northwest of Miller point. Potamogetonaceae Elev. 6 ft. 46° 18.6' N, 123° 42.4' W; T10N R8W S31 Potamogeton epihydrus Raf. Freshwater intertidal marsh, small muddy channel, with Scirpus triqueter, Lilaeopsis. Common in channels and washed ashore. U.S.A., WASHINGTON, KING COUNTY: Phenology: Fruits. Origin: Native. Welcome Lake. 47.7236° N, 122.044° W Peter F. Zika 22247 30 Aug 2005 Phenology: Fruits. Origin: Native. with David Giblin, Cathy Maxwell, Ben Legler Del Field s.n. 15 Aug 1995 WTU-370914 with Steve Majerick WTU-363848 Potamogetonaceae Potamogeton crispus L. Potamogetonaceae U.S.A., WASHINGTON, WAHKIAKUM COUNTY: Potamogeton natans L. East shore of Deep River near mouth, 1 air mile northwest of Miller Point; Grays Bay, Columbia River. U.S.A., WASHINGTON, COWLITZ COUNTY: Elev. 6 ft. Along Highway 504 on northeast side of Silver Lake, in an 46° 18.7' N, 123° 42.8' W; T10N R8W S31 embayment cut off from rest of lake by built-up road bed, 1/2 mile Freshwater intertidal marsh, mudflats and higher marsh, with Scirpus west of Silver Lake Cemetery. triqueter, Lilaeopsis. Occasional in channel. Phenology: Vegetative. Elev. 492 ft. Origin: Introduced. 46° 19.095' N, 122° 46.551' W; NAD 27, Source: GPS Boggy embayment with Typha, Spiraea, Nuphar, Potomogeton, Peter F. Zika 22251 30 Aug 2005 Utricularia, Salix geyeriana. Common; leaves floating. Phenology: with David Giblin, Cathy Maxwell, Ben Legler Vegetative. Origin: Native. WTU-370916 Ben Legler 3032 31 Aug 2005 with Peter F. Zika, David Giblin WTU-373754 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogeton pusillus L. U.S.A., WASHINGTON, PACIFIC COUNTY: U.S.A., WASHINGTON, KING COUNTY: North side of Pioneer Road, 1 air kilometer east of Clear Lake. Panther Lake, Kent. Elev. 16 ft. 47.4215° N, 122.188° W 46° 22.1' N, 124° 1.9' W; T10N R11W S10 Phenology: Vegetative. Origin: Native. Irrigation pond and adjacent agricultural fields of research cranberry station, full sun, damp ground. Abundant in irrigation pond, with Del Field s.n. 27 Jul 1995 Azolla and algae. Phenology: Fruits. Origin: Native. with Steve Majerick Peter F. Zika 22271 30 Aug 2005 WTU-363977 with David Giblin, Cathy Maxwell, Ben Legler Herbarium: WTU Potamogetonaceae Potamogeton amplifolius Tuck. Potamogetonaceae U.S.A., WASHINGTON, KING COUNTY: Potamogeton crispus L. North Lake. 47.3052° N, 122.2906° W U.S.A., WASHINGTON, CLARK COUNTY: Phenology: Vegetative. Origin: Native. Frenchman's Bar Waterfront Park on shore of Columbia River, west of Vancouver. Del Field s.n. 26 Jul 1995 Elev. 10 ft. with Cassandra Robertson, Steve Majerick 45° 41.023' N, 122° 45.989' W Sandy beach, dry soil, backed by Populus and Salix; sparsely WTU-363980 vegetated. Anchored to sandy bottom just below low tide level. Phenology: Vegetative. Origin: Introduced. Potamogetonaceae Ben Legler 3090 21 Sep 2005 with David Giblin Potamogeton gramineus L. WTU-370839 U.S.A., WASHINGTON, KING COUNTY: Ravensdale Lake. 47.3511° N, 121.992° W Potamogetonaceae Phenology: Fruits. Origin: Native. Potamogeton pusillus L. Del Field s.n. 10 Aug 1995 with Mike Schroeder, Wendy Cooke U.S.A., WASHINGTON, KING COUNTY: Lucerne/Pipe Lake. WTU-364008 47.368° N, 122.0517° W Latitude and Longitude for Pipe Lake is 47.3660N and 122.0604W. Phenology: Vegetative. Origin: Native. Potamogetonaceae Del Field s.n. 23 Aug 1994 Potamogeton amplifolius Tuck. with Steve Majerick U.S.A., WASHINGTON, KING COUNTY: WTU-363963 Ravensdale Lake. 47.3511° N, 121.992° W Phenology: Fruits. Origin: Native. Potamogetonaceae Del Field s.n. 10 Aug 1995 Potamogeton amplifolius Tuck. with Wendy Cooke, Mike Schroeder U.S.A., WASHINGTON, KING COUNTY: WTU-364012 Lucerne/Pipe Lake. 47.368° N, 122.0517° W Latitude and Longitude for Pipe Lake is 47.3660N and 122.0604W. Potamogetonaceae Phenology: Vegetative. Origin: Native. Potamogeton pusillus L. Del Field s.n. 23 Aug 1994 with Steve Majerick U.S.A., WASHINGTON, KING COUNTY: Ravensdale Lake. WTU-363966 47.3511° N, 121.992° W Phenology: Vegetative. Origin: Native. Potamogetonaceae Del Field s.n. 10 Aug 1995 with Wendy Cooke, Mike Schroeder Potamogeton natans L. WTU-363959 U.S.A., WASHINGTON, KING COUNTY: Panther Lake, Kent. 47.4215° N, 122.188° W Phenology: Vegetative. Origin: Native. Del Field s.n. 27 Jul 1995 with Steve Majerick WTU-363976 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Allen Lake. Francis Lake. 47.6148° N, 121.887° W 47.4326° N, 122.0332° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 7 Aug 1995 Del Field s.n. 14 Aug 1995 with Steve Majerick, Dave Burton with Steve Majerick, Dave Burton WTU-364017 WTU-364032

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Allen Lake. Francis Lake. 47.6148° N, 121.887° W 47.4326° N, 122.0332° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 7 Aug 1995 Del Field s.n. 14 Aug 1995 with Steve Majerick, Dave Burton with Brian Moriarty, Steve Majerick WTU-364019 WTU-364034

Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Cottage Lake. Geneva Lake. 47.754° N, 122.087° W 47.2913° N, 122.2817° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 31 Jul 1995 Steve Majerick s.n. 26 Aug 1996 with Chuck Eberhart, Steve Majerick with Wendy Cooke WTU-364024 WTU-364046

Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Cottage Lake. Geneva Lake. 47.754° N, 122.087° W 47.2913° N, 122.2817° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 31 Jul 1995 Steve Majerick s.n. 26 Aug 1996 with Steve Majerick, Chuck Eberhart with Wendy Cooke WTU-364025 WTU-363986

Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Cottage Lake. Kathleen Lake. 47.754° N, 122.087° W 47.4783° N, 122.0881° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 31 Jul 1995 Del Field s.n. 17 Aug 1995 with Chuck Eberhart, Steve Majerick with Steve Majerick WTU-364028 WTU-363987 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Ravensdale Lake. Deep Lake. 47.3511° N, 121.992° W 47.2736° N, 121.94° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 10 Aug 1995 Del Field s.n. 28 Aug 1995 with Mike Schroeder, Wendy Cooke with Steve Majerick WTU-364010 WTU-364137

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, WHATCOM COUNTY: U.S.A., WASHINGTON, KING COUNTY: Along Baker Lake Road (Forest Service Road 11) where it crosses Deep Lake. small cove of Baker Lake; 0.25 mile northwest of Panarama Point 47.2736° N, 121.94° W Campground. Phenology: Vegetative. Origin: Native. Elev. 730 ft. 48° 43.548' N, 121° 40.288' W; WGS 84, uncertainty: 7 m., Del Field s.n. 28 Aug 1995 Source: GPS with Steve Majerick Wetland/pond on northwest side of road, dominated by Scirpus species; Juncus supiniformis, Phalaris arundinacea, and Hippuris WTU-364138 vulgaris. Floating leaves present, scattered in pond. Phenology: Fruits. Origin: Native. Potamogetonaceae Ben Legler 3647 29 Sep 2006 with David Giblin Potamogeton epihydrus Raf. WTU-373373 U.S.A., WASHINGTON, KING COUNTY: North Lake. 47.3052° N, 122.2906° W Potamogetonaceae Phenology: Vegetative. Origin: Native. Potamogeton amplifolius Tuck. Del Field s.n. 26 Jul 1995 with Steve Majerick, Casandra Robertson U.S.A., WASHINGTON, KING COUNTY: Bass Lake. WTU-364052 47.2548° N, 121.996° W Phenology: Fruits. Origin: Native. Potamogetonaceae Del Field s.n. 25 Jul 1995 with Steve Majerick Potamogeton epihydrus Raf. WTU-364127 U.S.A., WASHINGTON, KING COUNTY: Langlois Lake. 47.6371° N, 121.889° W Potamogetonaceae Phenology: Vegetative. Origin: Native. Potamogeton zosteriformis Fernald Del Field s.n. 1 Aug 1995 with Steve Majerick U.S.A., WASHINGTON, KING COUNTY: Bass Lake. WTU-364067 47.2548° N, 121.996° W Phenology: Fruits. Origin: Native. Potamogetonaceae Del Field s.n. 25 Jul 1995 with Steve Majerick Potamogeton pusillus L. WTU-364128 U.S.A., WASHINGTON, KING COUNTY: Five Mile Lake. 47.2724° N, 122.2863° W Potamogetonaceae Phenology: Vegetative. Origin: Native. Potamogeton pusillus L. Steve Majerick s.n. 26 Aug 1996 with Wendy Cooke U.S.A., WASHINGTON, KING COUNTY: Alice Lake. WTU-364076 47.5326° N, 121.8878° W Phenology: Vegetative. Origin: Native. Del Field s.n. 21 Aug 1995 with Steve Majerick WTU-364120 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton natans L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Five Mile Lake. Killarney Lake. 47.2724° N, 122.2863° W 47.2855° N, 122.2926° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Steve Majerick s.n. 26 Aug 1996 Del Field s.n. 22 Aug 1994 with Wendy Cooke with Steve Majerick WTU-364083 WTU-364148

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Trout Lake. Killarney Lake. 47.2662° N, 122.28° W 47.2855° N, 122.2926° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Steve Majerick s.n. 26 Aug 1996 Gerry s.n. 11 Sep 1995 with Wendy Cooke WTU-364149 WTU-364091 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Killarney Lake. Trout Lake. 47.2855° N, 122.2926° W 47.2662° N, 122.28° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Gerri Baldwin s.n. 19 Jul 1995 Steve Majerick s.n. 26 Aug 1996 with Steve Majerick, Bill Priest with Wendy Cooke WTU-364151 WTU-364092 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: McDonald Lake. Alice Lake. 47.4716° N, 122.0773° W 47.5326° N, 121.8878° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 16 Aug 1995 Del Field s.n. 21 Aug 1995 with Steve Majerick with Steve Majerick WTU-364156 WTU-364113 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: McDonald Lake. Killarney Lake. 47.4716° N, 122.0773° W 47.2855° N, 122.2926° W Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Del Field s.n. 16 Aug 1995 Gerry s.n. 11 Nov 1995 with Steve Majerick WTU-364141 WTU-364162 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton natans L. U.S.A., WASHINGTON, SNOHOMISH COUNTY: U.S.A., WASHINGTON, KITTITAS COUNTY: Along north shore of Stillaguamish River 1.9 air miles west of Along Burlington-Northern Santa Fe railroad at North Thorp Highway Arlington; in old side channel of river. crossing, 1.7 miles from Thorp. Elev. 37 ft. Elev. 1660 ft. 48° 11' 34" N, 122° 10' 1" W; WGS 84, Source: Digital map 47° 5.213' N, 120° 41.506' W; T18N R17E S3 Still shallow water in silty side channel; floods in winter. Single patch In standing shallow water. Other plants: Typha latifolia, Myosotis ca. 3 meters across submerged in shallow water. Phenology: laxa, Salix exigua, Elodea canadensis. Fruit; common. Phenology: Vegetative. Origin: Introduced. Fruits. Origin: Native. Ben Legler 3683 15 Sep 2006 Don Knoke 997 23 Sep 2005 WTU-368373 WTU-365180

Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton alpinus Balbis U.S.A., WASHINGTON, WHATCOM COUNTY: U.S.A., WASHINGTON, KITTITAS COUNTY: Silver Lake, 9 miles southeast of Sumas; on south and southeast South Fork Meadows along South Fork Taneum Creek, 3 air miles ends of lake. west-southwest of junction of north and south forks of creek. Elev. 770 ft. Elev. 3463 ft. 48° 58' 19" N, 122° 4' W; NAD 83 47° 5' 44" N, 120° 59' 32" W; WGS 84, Source: Digital map Clear water, soft muddy bottom, with abundant aquatic growth in Flat, mesic to wet, open meadow with scattered Alnus, Crataegus, shallows. Stems round in cross-section; plants all sterile; forming and cold ponds of standing water. Abundant in pools; leaves dense patches on bottom in 1-2 meters of water, not reaching water submerged and weakly floating, not much dimorphic, green. surface. Phenology: Vegetative. Origin: Native. Phenology: Fruits. Origin: Native. Ben Legler 2288 30 Aug 2004 Barbara Williams 06-66 22 Sep 2006 with David Giblin, Ben Legler WTU-382519 WTU-376081 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, SKAGIT COUNTY: South end of Big Lake, southeast of Mt. Vernon. U.S.A., WASHINGTON, WHATCOM COUNTY: Elev. 85 ft. Northeast end of Baker Lake where Baker River enters lake; 48° 21' 52" N, 122° 12' 57" W; NAD 27 northeast of Concrete. Shallow water 1-3 meters deep with Nuphar polysepalum, Elev. 761 ft. Nymphaea odorata, abundant filamentous algae; bordered by Typha 48° 44.527' N, 121° 34.086' W; WGS 84, Source: Digital map marsh. Leaves both floating and submerged; plants forming loose Extensive Sand, mud and gravel flats exposed by drawdown of lake; patches in ca. 2 meter deep water. Phenology: Flowers. Origin: dry to saturated, with large patches of Ranunculus flammula, Juncus Native. cf. supiriformis. Locally common in 0.5-1 meter deep water. [Mixed collection; filed under P. alpinus]. Phenology: Vegetative. Origin: Ben Legler 2362 6 Sep 2004 Native. WTU-382267 David Giblin 756 29 Sep 2006 with Ben Legler Potamogetonaceae WTU-378358A Potamogeton foliosus Raf. U.S.A., WASHINGTON, SKAGIT COUNTY: Potamogetonaceae South end of Big Lake, southeast of Mt. Vernon. Elev. 85 ft. Potamogeton berchtoldii Fieber 48° 21' 52" N, 122° 12' 57" W; NAD 27 Shallow water 1-3 meters deep with Nuphar polysepalum, U.S.A., WASHINGTON, WHATCOM COUNTY: Nymphaea odorata, abundant filamentous algae; bordered by Typha Northeast end of Baker Lake where Baker River enters lake; marsh. Leaves all submerged < 1 meter below water surface; stems northeast of Concrete. loose, not forming dense clumps. Phenology: Fruits. Origin: Native. Elev. 761 ft. 48° 44.527' N, 121° 34.086' W; WGS 84, Source: Digital map Ben Legler 2364 6 Sep 2004 Extensive Sand, mud and gravel flats exposed by drawdown of lake; dry to saturated, with large patches of Ranunculus flammula, Juncus WTU-382268 cf. supiriformis. Common in mud-flats and small side channels of stream. Phenology: Vegetative. Origin: Native. David Giblin 757 29 Sep 2006 with Ben Legler Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: Everett Lake, 7/8 mile northeast of Concrete. Lake McMurray, northeast corner of lake. Elev. 670 ft. Elev. 230 ft. 48° 32.6' N, 121° 43.647' W; WGS 84, uncertainty: 6 m., Source: 48° 19.444' N, 122° 13.445' W; WGS 84, uncertainty: 5 m. GPS Undeveloped lake edge with wetlands; floating logs in shallow water Small, open lake surrounded by second-growth forest, with (less than 1 meter deep) dominated by Nymphaea odorata. Locally Sparganium, Elodea canadensis, Myriophyllum, Utriculana vulgaris, common in a loose patch; no underwater leaves observed. Phalaris. In shallows on northeast side of lake; floating leaves Phenology: Fruits. Origin: Native. present. Phenology: Vegetative. Origin: Native. David Giblin 790 16 Oct 2006 Ben Legler 3633 29 Sep 2006 with David Giblin WTU-376654 WTU-378007 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, SKAGIT COUNTY: Lake McMurray, northeast corner of lake. U.S.A., WASHINGTON, WHATCOM COUNTY: Elev. 230 ft. Along Baker Lake Road (Forest Service Road 11) where it crosses 48° 19.444' N, 122° 13.445' W; WGS 84, uncertainty: 5 m. small cove of Baker Lake; 0.25 mile northwest of Panarama Point Undeveloped lake edge with wetlands; floating logs in shallow water Campground. (less than 1 meter deep) dominated by Nymphaea odorata. Locally Elev. 730 ft. common in a dense patch in water to 2 meters deep; no leaves 48° 43.548' N, 121° 40.288' W; WGS 84, uncertainty: 7 m., reaching water surface. Phenology: Vegetative. Origin: Native. Source: GPS On southeast side of road in drawdown of lake; exposed muddy and David Giblin 791 16 Oct 2006 sandy shore with Scirpus species; Juncus cf. supiniformis, Ranunculus flammula. Floating leaves present, submerged leaves WTU-376653 lanceolate, ca. [circa] 6-7 millimeters wide; local in shallow stream. Phenology: Fruits. Origin: Native. Potamogetonaceae Ben Legler 3648 29 Sep 2006 with David Giblin Potamogeton pusillus L. WTU-378357 U.S.A., WASHINGTON, SKAGIT COUNTY: Lake McMurray, northeast corner of lake. Elev. 230 ft. Potamogetonaceae 48° 19.444' N, 122° 13.445' W; WGS 84, uncertainty: 5 m. Undeveloped lake edge with wetlands; floating logs in shallow water Potamogeton natans L. (less than 1 meter deep) dominated by Nymphaea odorata. Locally common in moderately dense patxh in water to 1 meter deep. U.S.A., WASHINGTON, SKAGIT COUNTY: Phenology: Vegetative. Origin: Native. Heart Lake, naturally formed lake approximately 0.5 square mile in size. David Giblin 792 16 Oct 2006 Elev. 328 ft. 48° 28.494' N, 122° 37.702' W; WGS 84, uncertainty: 7 m. WTU-376652 Lake surrounded by coniferous forest; lake edge dominated by Salix, Nuphar, and Typha. Locally common in patches forming open mats on water surface. Phenology: Fruits. Origin: Native. Potamogetonaceae David Giblin 755 4 Oct 2006 Potamogeton natans L. WTU-377696 U.S.A., WASHINGTON, STEVENS COUNTY: Colville National Forest. Little Twin Lakes. Elev. 3696 ft. Potamogetonaceae 48.5748° N, 117.644° W; WGS 84 Shallow water with soft muck bottom and adjacent shoreline. Potamogeton pusillus L. Brassenia schreberi dominant. Locally common in shallow water at northern edge of lake. Phenology: Vegetative. Origin: Native. U.S.A., WASHINGTON, SKAGIT COUNTY: Campbell Lake. A naturally formed lake approximately 0.75 square David Giblin 1148 5 Sep 2007 miles in size. with Joe Arnett Elev. 76 ft. 48° 26.3' N, 122° 37.914' W; WGS 84, uncertainty: 9 m. WTU-379530 Shallow water and lake margin, Salix sp. dominant shrub species. Leaves with yellow glands at leaf bases; abundant in shallow, open water. Phenology: Vegetative. Origin: Native. Ben Legler 3668 5 Oct 2006 with David Giblin WTU-377733 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, STEVENS COUNTY: U.S.A., WASHINGTON, PEND OREILLE COUNTY: Colville National Forest. Little Twin Lakes. Colville National Forest. Lake Leo boat ramp, northwest side of lake. Elev. 3696 ft. Elev. 3280 ft. 48.5748° N, 117.644° W; WGS 84 48.6495° N, 117.496° W; WGS 84, uncertainty: 5 m., Source: Shallow water with soft muck bottom and adjacent shoreline. GPS Brassenia schreberi dominant. Locally common in water greater than Mix of sandy and silty lake bottom; water to 1 meter deep; shoreline 1 m deep at southern end of lake. Phenology: Vegetative. Origin: and shallow water dominated by Carex uliginosa and Spiraea Native. douglasii. Locally common in water to 1 meter deep. Phenology: Vegetative. Origin: Native. David Giblin 1149 5 Sep 2007 with Joe Arnett David Giblin 1170 6 Sep 2007 with Joe Arnett WTU-379523 WTU-379509 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton obtusifolius Mertens & W.D.J. Koch U.S.A., WASHINGTON, STEVENS COUNTY: U.S.A., WASHINGTON, PEND OREILLE Colville National Forest. Little Twin Lakes. COUNTY: Elev. 3696 ft. [locality and coordinates withheld; status in 48.5748° N, 117.644° W; WGS 84 Washington: G5/S2 (Sensitive; WANHP)] Shallow water with soft muck bottom and adjacent shoreline. Elev. 3280 ft. Brassenia schreberi dominant. Scattered near boat access point at Mix of sandy and silty lake bottom; water to 1 eastern edge of lake. Phenology: Vegetative. Origin: Native. meter deep; shoreline and shallow water dominated by Carex uliginosa and Spiraea David Giblin 1150 5 Sep 2007 douglasii. Locally common in shallow water. with Joe Arnett Reference specimen for illustration in Revision of Flora of the Pacific Northwest WTU WTU-379522 Herbarium, 2016. Phenology: Fruits. Origin: Native. Potamogetonaceae David Giblin 1173 with Joe Arnett Potamogeton pusillus L. 6 Sep 2007 U.S.A., WASHINGTON, STEVENS COUNTY: Colville National Forest. Little Twin Lakes. WTU-379500, WTU-V-025120 Elev. 3696 ft. 48.5748° N, 117.644° W; WGS 84 Potamogetonaceae Shallow water with soft muck bottom and adjacent shoreline. Brassenia schreberi dominant. Scattered in shallow water all around Potamogeton pusillus L. lake; cespitose. Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, PEND OREILLE COUNTY: David Giblin 1151 5 Sep 2007 Colville National Forest. Lake Leo boat ramp, northwest side of lake. with Joe Arnett Elev. 3280 ft. 48.6495° N, 117.496° W; WGS 84, uncertainty: 5 m., Source: WTU-378457 GPS Mix of sandy and silty lake bottom; water to 1 meter deep; shoreline and shallow water dominated by Carex uliginosa and Spiraea Potamogetonaceae douglasii. Scattered in shallow water near edge of pond. Phenology: Fruits. Origin: Native. Potamogeton epihydrus Raf. David Giblin 1174 6 Sep 2007 U.S.A., WASHINGTON, PEND OREILLE COUNTY: with Joe Arnett Colville National Forest. Lake Leo boat ramp, northwest side of lake. Elev. 3280 ft. WTU-379805 48.6495° N, 117.496° W; WGS 84, uncertainty: 5 m., Source: GPS Potamogetonaceae Mix of sandy and silty lake bottom; water to 1 meter deep; shoreline and shallow water dominated by Carex uliginosa and Spiraea Potamogeton robbinsii Oakes douglasii. Common in water to 1 meter deep. Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, STEVENS COUNTY: Washington Department of Natural Resources Trust Lands. Coffin David Giblin 1162 6 Sep 2007 Lake, west bank. with Joe Arnett Elev. 3125 ft. 48.5764° N, 117.555° W; WGS 84, uncertainty: 9 m., Source: WTU-379524 GPS 5 hectare lake with silty muck bottom; Carex lanuginosus and C. utriculata common along shore; Elodea densa common along bottom of shallow water areas. Abundant in shallow water with muddy bottom. Phenology: Vegetative. Origin: Native. David Giblin 1183 6 Sep 2007 with Joe Arnett WTU-379512 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton berchtoldii Fieber U.S.A., WASHINGTON, STEVENS COUNTY: U.S.A., WASHINGTON, STEVENS COUNTY: Colville National Forest. Little Twin Lakes. Unnamed pond at junction of roads at north end of Black Lake. Elev. 3696 ft. Elev. 6409 ft. 48.5748° N, 117.644° W; WGS 84 48.10166°, -117.4403°; WGS 84, uncertainty: 1000 m., Source: Shallow water with soft muck bottom and adjacent shoreline. GeoLocate, Georef'd by WTU Staff Brasenia schreberi dominant. Locally common in shallow water; Pond to 1.5 meters deep with no outlet; tea-colored water with silty growing among Brassenia. Phenology: Fruits. Origin: Native. muck bottom; water level apparent 1 meter higher earlier in season; Sparganium angustifolium and Potamogeton spp. common. Joe Arnett 07-110 4 Sep 2007 Common throughout pond in water to 0.5 meters deep. Phenology: with David Giblin Vegetative. Origin: Native. WTU-379860 Joe Arnett 07-123 5 Sep 2007 with David Giblin Potamogetonaceae WTU-379861 Potamogeton natans L. Potamogetonaceae U.S.A., WASHINGTON, STEVENS COUNTY: Unnamed pond at junction of roads at north end of Black Lake. Potamogeton natans L. Elev. 6409 ft. 48.10166°, -117.4403°; WGS 84, uncertainty: 1000 m., Source: U.S.A., WASHINGTON, STEVENS COUNTY: GeoLocate, Georef'd by WTU Staff Unnamed pond at junction of roads at north end of Black Lake. Pond to 1.5 meters deep with no outlet; tea-colored water with silty Elev. 6409 ft. muck bottom; water level apparent 1 meter higher earlier in season; 48.10166°, -117.4403°; WGS 84, uncertainty: 1000 m., Source: Sparganium angustifolium and Potamogeton spp. common. GeoLocate, Georef'd by WTU Staff Scattered in water to 0.5 meters deep. Phenology: Vegetative. Pond to 1.5 meters deep with no outlet; tea-colored water with silty Origin: Native. muck bottom; water level apparent 1 meter higher earlier in season; Sparganium angustifolium and Potamogeton spp. common. In Joe Arnett 07-120 5 Sep 2007 middle of pond in water to 1 meter deep. Phenology: Vegetative. with David Giblin Origin: Native. WTU-379858 Joe Arnett 07-124 5 Sep 2007 with David Giblin Potamogetonaceae WTU-379565 Potamogeton alpinus Balbis U.S.A., WASHINGTON, STEVENS COUNTY: Potamogetonaceae Unnamed pond at junction of roads at north end of Black Lake. Elev. 6409 ft. Potamogeton epihydrus Raf. 48.10166°, -117.4403°; WGS 84, uncertainty: 1000 m., Source: GeoLocate, Georef'd by WTU Staff U.S.A., WASHINGTON, STEVENS COUNTY: Pond to 1.5 meters deep with no outlet; tea-colored water with silty Public fishing boat ramp at south end of Black Lake. muck bottom; water level apparent 1 meter higher earlier in season; Elev. 3670 ft. Sparganium angustifolium and Potamogeton spp. common. 48.555° N, 117.624° W; WGS 84, uncertainty: 8 m. Scattered; in patches to 1 meter wide in water to 1 meter deep. Clear water to 0.5 meters deep along shoreline dominated by Carex Phenology: Flowers. Origin: Native. utriculata; Nuphar polysepala common in shallow water. Sections of rhizome free-floating along lake shoreline. Phenology: Vegetative. Joe Arnett 07-121 5 Sep 2007 Origin: Native. with David Giblin Joe Arnett 07-125 5 Sep 2007 WTU-379795 with David Giblin WTU-379797 Potamogetonaceae Potamogeton epihydrus Raf. Potamogetonaceae U.S.A., WASHINGTON, STEVENS COUNTY: Potamogeton epihydrus Raf. Unnamed pond at junction of roads at north end of Black Lake. Elev. 6409 ft. U.S.A., WASHINGTON, PEND OREILLE COUNTY: 48.10166°, -117.4403°; WGS 84, uncertainty: 1000 m., Source: Colville National Forest. Lake Leo shoreline and aquatic areas south GeoLocate, Georef'd by WTU Staff of end of Forest Road 513, east side of lake. Pond to 1.5 meters deep with no outlet; tea-colored water with silty Elev. 3280 ft. muck bottom; water level apparent 1 meter higher earlier in season; 48.6479° N, 117.492° W; WGS 84, uncertainty: 19 m., Source: Sparganium angustifolium and Potamogeton spp. common. GPS Occasional in water to 1 meter deep. Phenology: Flowers. Origin: Edge of lake and water to 1 meter deep; Carex lanuginosa dominant Native. in water. Uncommon in 1 meter deep water. Phenology: Vegetative. Origin: Native. Joe Arnett 07-122 5 Sep 2007 with David Giblin Joe Arnett 07-141 6 Sep 2007 with David Giblin WTU-379862 WTU-379863 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton friesii Rupr. U.S.A., WASHINGTON, PEND OREILLE COUNTY: U.S.A., WASHINGTON, KING COUNTY: Colville National Forest. Lake Leo shoreline and aquatic areas south Chester Morse Lake. Cedar River Delta. of end of Forest Road 513, east side of lake. Elev. 1550 ft. Elev. 3280 ft. T22N R9E S21; NAD 27, uncertainty: 805 m., Source: TRS2LL, 48.6479° N, 117.492° W; WGS 84, uncertainty: 19 m., Source: Georef'd by Ben Legler GPS 5 feet of water, mixed with P. gramineus. Part of Chester Morse Edge of lake and water to 1 meter deep; Carex lanuginosa dominant Lake Delta Vegetation Monitoring Project, SPU and Herrera in water. Common in up to 1 meter of water. Phenology: Fruits. Environmental Consultants, Seattle, WA. Phenology: Vegetative. Origin: Native. Origin: Native. Joe Arnett 07-145 6 Sep 2007 Josh Wozniak s.n. 9 Aug 2007 with David Giblin WTU-368201 WTU-379798 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton pusillus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, PEND OREILLE COUNTY: Chester Morse Lake. Cedar River Delta. Colville National Forest. Frater Lake. Elev. 1550 ft. Elev. 3204 ft. T22N R9E S21; NAD 27, uncertainty: 805 m., Source: TRS2LL, 48.6547° N, 117.483° W; WGS 84 Georef'd by Ben Legler 5 hectare pond with mucky shoreline and bottom. Schoenoplectus Submerged in shallow water, mixed with P. gramineus. Growing in 1 acutus and Carex spp. dominant. Uncommon; growing in mucky to 12 feet of water, widespread and abundant in the Cedar and Rex bottom in water less than 0.5 meters deep. Phenology: Fruits. Origin: River Deltas. Part of Chester Morse Lake Delta Vegetation Native. Monitoring Project, SPU and Herrera Enviornmental Consultants, Seattle, WA. Phenology: Flowers. Origin: Native. Joe Arnett 07-146 7 Sep 2007 with David Giblin Josh Wozniak s.n. 9 Aug 2007 WTU-379799 WTU-368199

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton gramineus L. U.S.A., WASHINGTON, PEND OREILLE COUNTY: U.S.A., WASHINGTON, KING COUNTY: Colville National Forest. Frater Lake. Cedar River Delta. Chester Morse Lake. Elev. 3204 ft. T22N R9E S21; NAD 27, uncertainty: 805 m., Source: TRS2LL, 48.6547° N, 117.483° W; WGS 84 Georef'd by Ben Legler 5 hectare pond with mucky shoreline and bottom. Schoenoplectus Part of Chester Morse Lake Delta Vegetation Monitoring Project, acutus and Carex spp. dominant. Common; growing in mucky SPU and Herrera Enviornmental Consultants, Seattle, WA. bottom up to 1 meter deep. Phenology: Vegetative. Origin: Native. Phenology: Fruits. Origin: Native. Joe Arnett 07-147 7 Sep 2007 Josh Wozniak s.n. 10 Oct 2007 with David Giblin WTU-368197 WTU-379800 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton gramineus L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, YAKIMA COUNTY: Chester Morse Lake, Rex River Delta. Wenatchee National Forest, base of Devil's Table. Forest Service 47.352968°, -121.672521°; WGS 84, uncertainty: 10000 m., Road 1503; 0.1 kilometers from junction with Forest Road 1501; Source: GeoLocate, Georef'd by WTU Staff Little Rattlesnake Creek Canyon. Part of Chester Morse Lake Delta Vegetation Monitoring Project, Elev. 3115 ft. SPU and Herrera Enviornmental Consultants, Seattle, WA. 46° 46.215' N, 121° 1.005' W; WGS 84, Source: GPS Phenology: Vegetative. Origin: Native. Seasonal pond surrounded by Ponderosa pine upland and dominated by Carex aquatilis. Common in standing water of pond; Josh Wozniak s.n. 6 Aug 2007 underwater leaves linear-lanceolate. Phenology: Vegetative. Origin: Native. WTU-368198 Megan A. Jensen 219 5 Jul 2007 with David Giblin, Don Knoke WTU-369445 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, PACIFIC COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: Loomis Lake, near boatlaunch, west of Pacific Way on 188th Place, Sixteen Lake, east of La Conner. Long Beach Peninsula. Elev. 350 ft. Elev. 16 ft. 48° 20.505' N, 122° 17.378' W; uncertainty: 9 m. 46° 26.3' N, 124° 2.7' W Deep, fairly clear lake with rim of Typha latifolia, Nuphar Marshy northwest shoreline, with Lemna minuta, Spirodela polysepalum; low aquatics abundance. Leaves wavy, cordate; polyrhiza, Azolla, Callitriche, Hydrocotyle, shallow sunny water. stipules not fibrous; submerged except for inflorescences; Submerged aquatic, stem flattened; common. Phenology: Fruits. uncommon. Phenology: Vegetative. Origin: Native. Origin: Native. Ben Legler 2357 3 Sep 2004 Peter F. Zika 23450 14 Aug 2007 with David Giblin, Tad Dilhoff WTU-367136 WTU-375220 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton praelongus Wulfen U.S.A., WASHINGTON, SKAGIT COUNTY: Clear Lake, south of Sedro Woolley. U.S.A., WASHINGTON, THURSTON COUNTY: Elev. 15 ft. West shore of Deep Lake, near boat launch. 48° 26.762' N, 122° 13.259' W; uncertainty: 7 m. Elev. 164 ft. Shallow, weedy lake with brownish water; Nuphar polysepalum, 46° 54.4' N, 122° 54.9' W; T16N R2W S3 Ceratophyllum, Scirpus, Typha. Uncommon; leaves all submerged, With Potamogeton robbinsii, and Potamogeton gramineus. green, stems somewhat flattened. Phenology: Vegetative. Origin: Submerged aquatic. Phenology: Vegetative. Origin: Native. Native. P. F. Zika 20190 14 Sep 2004 Ben Legler 2349 3 Sep 2004 with B. Legler with David Giblin, Tad Dilhoff WTU-367783 WTU-375419 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, THURSTON COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: West shore of Deep Lake, near boat launch. Clear Lake, south of Sedro Woolley. Elev. 164 ft. Elev. 15 ft. 46° 54.4' N, 122° 54.9' W; T16N R2W S3 48° 26.762' N, 122° 13.259' W; uncertainty: 7 m. With Potamogeton praelongus, and Utricularia inflata. Submerged Shallow, weedy lake with brownish water; Nuphar polysepalum, aquatic. Phenology: Vegetative. Origin: Native. Ceratophyllum, Scirpus, Typha. Leaves floating and submerged; occassional. Phenology: Fruits. Origin: Native. P. F. Zika 20191 14 Sep 2004 with B. Legler Ben Legler 2350 3 Sep 2004 with David Giblin, Tad Dilhoff WTU-367784 WTU-375222 Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton robbinsii Oakes U.S.A., WASHINGTON, THURSTON COUNTY: West shore of Deep Lake, near boat launch. U.S.A., WASHINGTON, SKAGIT COUNTY: Elev. 164 ft. Sixteen Lake, east of La Conner. 46° 54.4' N, 122° 54.9' W; T16N R2W S3 Elev. 350 ft. With Potamogeton praelongus, and Potamogeton gramineus. 48° 20.505' N, 122° 17.378' W; uncertainty: 9 m. Phenology: Vegetative. Origin: Native. Deep, fairly clear lake with rim of Typha latifolia, Nuphar polysepalum; low aquatics abundance. Leaves distichous; common, P. F. Zika 20192 14 Sep 2004 submerged on bottom in 1-1.5 meters of water. Phenology: with B. Legler Vegetative. Origin: Native. WTU-367785 Ben Legler 2356 3 Sep 2004 with David Giblin, Tad Dilhoff WTU-375219 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton crispus L. U.S.A., WASHINGTON, KITTITAS COUNTY: U.S.A., WASHINGTON, SKAMANIA COUNTY: Wenatchee National Forest. Swamp Lake, west side of lake. Near mouth of Woodward Creek, north shore of Columbia River. Elev. 2402 ft. Elev. 32 ft. 47.31105° N, 121.30075° W; WGS 84, Source: GPS 45° 37.3' N, 122° 1.3' W; T2N R6E S35 West side of lake in Carex dominated meadow with water to 1.5 Near boat ramp, with Elodea canadensis, Myriophyllum spicatum. meters deep running in channels. Locally common and abundant in Uncommon aquatic, floating. Phenology: Vegetative. Origin: water to 0.3 meter deep. Phenology: Fruits. Origin: Native. Introduced. Don Knoke 1500 13 Sep 2007 Peter F. Zika 22585 12 Oct 2005 with David Giblin, Barbara Williams, Megan A. Jensen WTU-368254 WTU-375090 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, BENTON COUNTY: U.S.A., WASHINGTON, KITTITAS COUNTY: Near causeway to Crow Butte Island, north shore of Columbia River. Wenatchee National Forest. Elev. 262 ft. 47.42033°, -121.09697°; WGS 84, uncertainty: 30000 m., Source: 45° 52' N, 119° 50' W; T4N R24E S5 GeoLocate, Georef'd by WTU Staff Full sun, with Elodea canadensis, Myriophyllum spicatum. Common Cold water creek through forest. Phenology: Vegetative. Origin: aquatic, floating. Phenology: Vegetative. Origin: Introduced. Native. Peter F. Zika 22595 13 Oct 2005 David Giblin 1197 13 Sep 2007 WTU-368255 WTU-374942 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton gramineus L. U.S.A., WASHINGTON, PEND OREILLE COUNTY: U.S.A., WASHINGTON, KITTITAS COUNTY: Near west shore of reservoir on Pend Oreille River, east of Route Wenatchee National Forest. Cottonwood Lake. 20, north of mouth of Lost Creek. Elev. 3910 ft. Elev. 2066 ft. 47.34854° N, 121.42999° W; WGS 84, Source: GPS 48° 36.8' N, 117° 21.8' W; T36N R43E S15 Two hectare lake surrounded by old growth or mature second Grassy shore, over granite. Leaf margins wavy, floating in water growth forest. South end of lake bordered by meadow of Carex sp. near shore. Phenology: Vegetative. Origin: Introduced. Common along south edge of lake. Phenology: Vegetative. Origin: Native. Peter F. Zika 19520 9 May 2004 David Giblin 1220 13 Sep 2007 WTU-368561 with Don Knoke, Barbara Williams, Megan A. Jensen WTU-375082 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton crispus L. U.S.A., WASHINGTON, ISLAND COUNTY: South shores of Cranberry Lake; north end of Whidbey Island, U.S.A., WASHINGTON, KLICKITAT COUNTY: southwest end Deception Pass, Puget Sound. Mouth of Alder Creek, north shore of Columbia River. Elev. 6 ft. Elev. 262 ft. 48° 24' N, 122° 39' W; T34N R1E S35 45° 50.2' N, 119° 55.7' W; T4N R23E S10 With Elodea canadensis, Potamogeton praelongus, Potamogeton Full sun, with Elodea canadensis, Myriophyllum spicatum. amplifolius, Potamogeton pusillus, Ceratophyllum demersum. Occasional aquatic, floating. Phenology: Vegetative. Origin: Common aquatic. Phenology: Flowers & Fruits. Origin: Native. Introduced. P. F. Zika 17604 22 Aug 2002 Peter F. Zika 22599 13 Oct 2005 with C. B. Hellquist, F. Weinmann WTU-368253 WTU-366214 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton natans L. U.S.A., WASHINGTON, SNOHOMISH COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: South shore of Lake Riley, east of Arlington. Texas Pond, by Forest Service Road 29 circa 3 miles from Highway Elev. 530 ft. 530, 7.9 miles north of Darrington. 48° 14' 41" N, 121° 56' 42" W; NAD 27 Elev. 1560 ft. Brushy sphagnum-based boggy shoreline with Spiraea douglasii, 48° 22' 4" N, 121° 35' 9" W; NAD 27 Kalmia, Ledum groenlandicum. In circa 5 feet of water; leaves Small acidic pond, floating logs, sphagnum mats, surrounded by floating; uncommon. Phenology: Fruits. Origin: Native. Tsuga, Thuja forest. Leaves all floating; in shallow water among Typha latifolia, sphagnum. Phenology: Vegetative. Origin: Native. Ben Legler 2259 27 Aug 2004 with David Giblin Ben Legler 2277 27 Aug 2004 with David Giblin WTU-375353 WTU-375357 Potamogetonaceae Potamogetonaceae Potamogeton illinoensis Morong Potamogeton nodosus Poir. U.S.A., WASHINGTON, SNOHOMISH COUNTY: Along Highway 530 at Hazel, 10 miles west of Darrington on south U.S.A., OREGON, MULTNOMAH COUNTY: side of road. Delta of Sandy River, near south shore of Columbia River, NE of Elev. 280 ft. Troutdale airport. 48° 16.609' N, 121° 48.328' W Elev. 30 ft. Small shallow ponds on south side of road, surrounded by Alnus T1N R4E S30 NW1/4; NAD 27, uncertainty: 805 m., Source: rubra, Typha latifolia. Leaves mostly submerged; patch of plants in TRS2LL, Georef'd by Ben Legler middle of pond, circa 1 meter water. Phenology: Fruits. Origin: Aquatic in wetland, with Potamogeton pusillus. Phenology: Native. Vegetative. Origin: Native. Ben Legler 2264 27 Aug 2004 P. F. Zika 11682A 24 Jun 1992 with David Giblin WTU-368834 WTU-375355 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton nodosus Poir. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, PEND OREILLE COUNTY: Texas Pond, by Forest Service Road 29 circa 3 miles from Highway East bank of Pend Oreille River, LeClerc Creek Road, near Usk. 530, 7.9 miles north of Darrington. Elev. 2000 ft. Elev. 1560 ft. 48.31809°, -117.2702°; WGS 84, uncertainty: 1000 m., Source: 48° 22' 4" N, 121° 35' 9" W; NAD 27 GeoLocate, Georef'd by WTU Staff Small acidic pond, floating logs, sphagnum mats, surrounded by With Elodea canadensis, Myriophyllum spicatum. Common aquatic Tsuga, Thuja forest. Leaves floating and submerged; dimorphic, in drifted to shore. Phenology: Fruits. Origin: Native. circa 2 meters of water. Phenology: Fruits. Origin: Native. Peter F. Zika 22499 5 Oct 2005 Ben Legler 2275 27 Aug 2004 with David Giblin WTU-369167 WTU-375379 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. × Potamogeton praelongus Wulf. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, ISLAND COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: South shores of Cranberry Lake; north end of Whidbey Island, Texas Pond, by Forest Service Road 29 circa 3 miles from Highway southwest end Deception Pass, Puget Sound. 530, 7.9 miles north of Darrington. Elev. 6 ft. Elev. 1560 ft. 48° 24' N, 122° 39' W; T34N R1E S35 48° 22' 4" N, 121° 35' 9" W; NAD 27 With Elodea canadensis, Potamogeton praelongus, Potamogeton Small acidic pond, floating logs, sphagnum mats, surrounded by amplifolius, Potamogeton pusillus, Ceratophyllum demersum. Tsuga, Thuja forest. Floating leaves narrowly lanceolate; submerged Common aquatic, branched, with floating leaves, submerged leaves leaves +/- linear; uncommon in deep water. Phenology: Fruits. clasping, never cucullate at tip. Phenology: Flowers. Origin: Native. Origin: Native. P. F. Zika 17601 22 Aug 2002 Ben Legler 2276 27 Aug 2004 with C. B. Hellquist, F. Weinmann with David Giblin WTU-369372 WTU-375380 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, ISLAND COUNTY: U.S.A., WASHINGTON, SKAGIT COUNTY: South shores of Cranberry Lake; north end of Whidbey Island, Campbell Lake. A naturally formed lake approximately 0.75 square southwest end Deception Pass, Puget Sound. miles in size. Elev. 6 ft. Elev. 76 ft. 48° 24' N, 122° 39' W; T34N R1E S35 48° 26.563' N, 122° 37.234' W; WGS 84, uncertainty: 8 m. With Elodea canadensis, Potamogeton praelongus, Potamogeton Lake margin comprised of natural areas interspersed with residential amplifolius, Potamogeton pusillus, Ceratophyllum demersum. development. Lake margins shallow and dominated by Scirpus Common aquatic. Phenology: Fruits. Origin: Native. acutus, Myriophyllum species dominant aquatic species. Clasping leaf bases; scattered in 1+ meter deep water. Phenology: Fruits. P. F. Zika 17605 22 Aug 2002 Origin: Native. with C. B. Hellquist, F. Weinmann Ben Legler 3663 5 Oct 2006 WTU-369371 with David Giblin WTU-369957 Potamogetonaceae Potamogeton pusillus L. Potamogetonaceae U.S.A., WASHINGTON, MASON COUNTY: Potamogeton crispus L. Extreme northeast end of Mason Lake, near boat ramp. Elev. 196 ft. U.S.A., WASHINGTON, WALLA WALLA COUNTY: 47° 21.4' N, 122° 55.3' W; T22N R2W S34 Southeast shore of reservoir on Snake River, Lake Sacajawea, Mucky bottom, with Potamogeton amplifolius, Potamogeton alpinus, Charbonneau Park, 1.5 air miles east of Ice Harbor Dam. Utricularia vulgaris. Submerged aquatic. Phenology: Vegetative. Elev. 442 ft. Origin: Native. 46° 15.4' N, 118° 50.8' W; T9N R32E S19 With Potamogeton nodosus, Myriophyllum spicatum, Elodea P. F. Zika 20202 14 Sep 2004 canadensis. Uncommon aquatic near boatramp. Phenology: with B. Legler Vegetative. Origin: Introduced. WTU-368977 Peter F. Zika 22344 12 Sep 2005 WTU-370067 Potamogetonaceae Potamogeton praelongus Wulfen Potamogetonaceae U.S.A., WASHINGTON, JEFFERSON COUNTY: Potamogeton nodosus Poir. Northwest shores of Crocker Lake. Elev. 196 ft. U.S.A., WASHINGTON, WALLA WALLA COUNTY: 47° 56.2' N, 122° 53' W; T28N R2W S12 Southeast shore of reservoir on Snake River, Lake Sacajawea, 0.5 meter water, with Elodea canadensis, algae, Nuphar. Occasional Charbonneau Park, 1.5 air miles east of Ice Harbor Dam. submerged aquatic. Phenology: Vegetative. Origin: Native. Elev. 442 ft. 46° 15.4' N, 118° 50.8' W; T9N R32E S19 P. F. Zika 20174 9 Sep 2004 With Potamogeton crispus, Myriophyllum spicatum, Elodea with F. Weinmann canadensis. Uncommon aquatic near boatramp. Phenology: Vegetative. Origin: Native. WTU-369247 Peter F. Zika 22345 12 Sep 2005 Potamogetonaceae WTU-370065 Potamogeton nodosus Poir. Potamogetonaceae U.S.A., WASHINGTON, FRANKLIN COUNTY: Southwest shore of Dalton Lake, north shore of reservoir on Potamogeton crispus L. Columbia River (Lake Sacajawea). Elev. 442 ft. U.S.A., WASHINGTON, DOUGLAS COUNTY: 46° 17.7' N, 118° 48.4' W; T9N R32E S3 East shore of reservoir, Columbia River, opposite mouth of Entiat Shallow water, with Myriophyllum spicatum, Cyperus bipartitus, River, Orondo Park. Scirpus acutus, Salix exigua. Occasional aquatic. Phenology: Elev. 708 ft. Vegetative. Origin: Native. 47° 39.4' N, 120° 12.9' W With Potamogeton richardsonii, Elodea canadensis. Washed ashore Peter F. Zika 22321 12 Sep 2005 at boat ramp. Phenology: Vegetative. Origin: Introduced. WTU-369495 Peter F. Zika 22410 25 Sep 2005 WTU-370140 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton natans L. CANADA, BRITISH COLUMBIA: U.S.A., WASHINGTON, WHATCOM COUNTY: Wells Gray Provincial Park, Murtle River at base of Pyramid Ross Lake National Recreation Area. Thunder Lake. Midpoint of Mountain. Lake on western shore. 52° N, 122° 10' W Elev. 1348 ft. Shore along moderately swift water. Phenology: Flowers. Origin: 48.69689°, -121.10911°; WGS 84, Source: Georeferenced, Native. Georef'd by WTU Staff Aquatic emergent to upland terrestrial habitat along edge of lake. Curtis Bjork 9727 16 Aug 2004 Locally common in water to 2 m deep. Phenology: Fruits. Origin: with Ken Wright, Derek Woods Native. WTU-371160 Cheryl Lowe 08-15 17 Aug 2008 with Bay Renaud, Steve Hahn, Maria Gerace, Mignonne Bivin, David Potamogetonaceae Giblin Potamogeton gramineus L. WTU-374263 CANADA, BRITISH COLUMBIA: Vancouver Island; Spider Lake. Potamogetonaceae 49° 21' N, 124° 37' W Royal British Columbia Museum Accession Number V183320. Potamogeton alpinus Balbis Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, WHATCOM COUNTY: Adolf Ceska 3132 2 Jul 1978 Ross Lake National Recreation Area. Thunder Lake. Midpoint of with Oldriska Ceska Lake on western shore. Elev. 1348 ft. WTU-371258 48.69689°, -121.10911°; WGS 84, Source: Georeferenced, Georef'd by WTU Staff Aquatic emergent to upland terrestrial habitat along edge of lake. Potamogetonaceae Phenology: Fruits. Origin: Native. Potamogeton pusillus L. Cheryl Lowe 08-16 17 Aug 2008 with Bay Renaud, Steve Hahn, Maria Gerace, Mignonne Bivin, David U.S.A., OREGON, MULTNOMAH COUNTY: Giblin Near south shore of Columbia River, delta of Sandy River. Elev. 20 ft. WTU-374262 T1N R4E S29 SE 1/4 of NW 1/4; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler Aquatic in wetland. Origin: Native. Potamogetonaceae P. F. Zika 11767 26 Jul 1992 Potamogeton gramineus L. WTU-371490 U.S.A., WASHINGTON, WHATCOM COUNTY: Ross Lake National Recreation Area. South end of Thunder Lake. Elev. 1348 ft. Potamogetonaceae 48.69478°, -121.10793°; WGS 84, Source: Georeferenced, Georef'd by WTU Staff Potamogeton crispus L. Submergent aquatic zone to upland forest understory. Common in water to 1 m deep. Phenology: Flowers. Origin: Native. U.S.A., OREGON, MULTNOMAH COUNTY: South shore of Columbia river, opposite southeast end of Gary David Giblin 2256 17 Aug 2008 Island, base of sandy bluff. with Mignonne Bivin, Steve Hahn, Maria Gerace, Bay Renaud, Elev. 0 ft. Cheryl Lowe T1N R4E S20 SW 1/4 of SW 1/4; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler WTU-374232 Aquatic, rooted in sand. Origin: Introduced. P. F. Zika 11772 26 Jul 1992 Potamogetonaceae WTU-371498 Potamogeton berchtoldii Fieber U.S.A., OREGON, POLK COUNTY: Potamogetonaceae [locality and coordinates withheld; status in Oregon: S3? (Rare?; OBIC)] Stuckenia pectinata (L.) Borner In artificial pond, with Sparganium emersum, Callitriche, Eleocharis obtusa. Aquatic. Phenology: Fruits. Origin: Native. U.S.A., OREGON, LINCOLN COUNTY: Marsh near mouth of Salmon River. P. F. Zika 11837 5 Aug 1992 Elev. 10 ft. T6S R11W S25; NAD 27, uncertainty: 805 m., Source: TRS2LL, WTU-373292 Georef'd by Ben Legler With Myriophyllum, Juncus effusus, south side of river. Phenology: Flowers. Origin: Native. Peter F. Zika 11764 22 Jul 1992 WTU-372177 Potamogetonaceae Potamogetonaceae Stuckenia filiformis (Pers.) Börner Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., OREGON, WALLOWA COUNTY: U.S.A., WASHINGTON, LINCOLN COUNTY: [locality and coordinates withheld; status in Oregon: S3 (Rare; U.S. Bureau of Land Management at Twin Lakes. OBIC)] Elev. 1880 ft. Elev. 7725 ft. 47.53065°, -118.5057°; WGS 84, Source: GeoLocate, Georef'd by In deep water, with Elodea, limy bedrock. Common. Phenology: WTU Staff Vegetative. Origin: Native. Lake edge and riparian zone connecting the two lakes. Schoenoplectus and Veronica abundant and dominant in wet areas. P. F. Zika 11822 31 Jul 1992 Scabland/shrub-steppe community outside of riparian zone. Leaves broad; margins wavy; common in water to 1 meter deep in north lake WTU-373291 at boat launch. Phenology: Flowers. Origin: Native. Potamogetonaceae David Giblin 1932 27 Jun 2008 Potamogeton natans L. WTU-380738 U.S.A., OREGON, POLK COUNTY: Near Pheasant Creek, north side of Route 18. Potamogetonaceae T6S R8W S7 NE; WGS 84, uncertainty: 500 m., Source: Digital map, Georef'd by John Bassett Potamogeton foliosus Raf. In artificial pond, with Sparganium emersum, Callitriche, Eleocharis obtusa. Aquatic. Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, LINCOLN COUNTY: U.S. Bureau of Land Management at Twin Lakes. P. F. Zika 11835 5 Aug 1992 Elev. 1880 ft. 47.53065°, -118.5057°; WGS 84, Source: GeoLocate, Georef'd by WTU-373288 WTU Staff Lake edge and riparian zone connecting the two lakes. Schoenoplectus and Veronica abundant and dominant in wet areas. Potamogetonaceae Scabland/shrub-steppe community outside of riparian zone. Leaves linear; common and abundant in debris blown in along shoreline of Potamogeton epihydrus Raf. south lake. Phenology: Vegetative. Origin: Native. U.S.A., OREGON, POLK COUNTY: David Giblin 1933 27 Jun 2008 Near Pheasant Creek, north side of Route 18. T6S R8W S7 NE; WGS 84, uncertainty: 500 m., Source: Digital WTU-380534 map, Georef'd by John Bassett In artificial pond, with Sparganium emersum, Callitriche, Eleocharis obtusa. Aquatic. Phenology: Fruits. Origin: Native. Potamogetonaceae P. F. Zika 11836 5 Aug 1992 Potamogeton friesii Rupr. WTU-373289 U.S.A., WASHINGTON, LINCOLN COUNTY: U.S. Bureau of Land Management at Twin Lakes. Elev. 1880 ft. Potamogetonaceae 47.53065°, -118.5057°; WGS 84, Source: GeoLocate, Georef'd by WTU Staff Potamogeton berchtoldii Fieber Lake edge and riparian zone connecting the two lakes. Schoenoplectus and Veronica abundant and dominant in wet areas. U.S.A., OREGON, LINCOLN COUNTY: Scabland/shrub-steppe community outside of riparian zone. Leaves [locality and coordinates withheld; status in Oregon: S3? (Rare?; lanceolate; common and abundant in water to 1 meter deep near OBIC)] boat launch of north lake. Phenology: Flowers. Origin: Native. Elev. 65 ft. With Egeria densa, Isoetes occidentalis. Aquatic. Phenology: David Giblin 1934 27 Jun 2008 Vegetative. Origin: Native. WTU-380536 P. F. Zika 11843 8 Aug 1992 WTU-373287 Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae U.S.A., WASHINGTON, LINCOLN COUNTY: Potamogeton richardsonii (A. Benn.) Rydb. U.S. Bureau of Land Management land. Coffeepot Lake. Shoreline area within 50 meters either side of boat ramp. U.S.A., WASHINGTON, KITTITAS COUNTY: Elev. 1804 ft. West Ellensburg Park, Ellensburg. 47.50043° N, 118.55564° W; WGS 84, uncertainty: 12 m., Elev. 1518 ft. Source: GPS 46° 59.76' N, 120° 33.941' W; T17N R18E S3; WGS 84 Typha latifolia/Schoenoplectus dominated shoreline of Coffeepot In slow-moving stream. Other plants: Typha latifolia, Bidens Lake. Lake appears to be eutrophic; waters turbid. Scattered in frondosa, Salix exigua, Alisma plantago-aquatica. Fruit greenish; water to 0.5 meters deep. Phenology: Vegetative. Origin: Native. occasional. Phenology: Fruits. Origin: Native. David Giblin 1864 26 Jun 2008 Don Knoke 1737 24 Sep 2008 WTU-380729 WTU-373913 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton crispus L. U.S.A., WASHINGTON, ADAMS COUNTY: U.S.A., WASHINGTON, GRANT COUNTY: Herman Lake, along shoreline near boat ramp. Potholes Wildlife Area. Drainage slough west side of road, south Elev. 944 ft. side of slough. From roadside to 2 kilometers west of road. 46.89746° N, 119.19958° W; WGS 84, uncertainty: 3 m. Elev. 314 m. From 0.7 meters deep in lake to upland area adjacent to shoreline. 47.08172° N, 119.34336° W; WGS 84, uncertainty: 5 m. Schoenoplectus acutus, Typha sp., and Juncus spp. dominant. Shallow water of slough and adjacent sandy embankment up to 50 Floating leaves elliptical; locally common. Phenology: Fruits. Origin: meters in from slough. Moisture gradient from saturated to dry and Native. alkaline. Growing in shallow water of slough. Phenology: Vegetative. Origin: Introduced. David Giblin 2378 4 Sep 2008 David Giblin 2328 29 Aug 2008 WTU-381146 WTU-380323 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, ADAMS COUNTY: Herman Lake, along shoreline near boat ramp. U.S.A., WASHINGTON, WAHKIAKUM Elev. 944 ft. COUNTY: 46.89746° N, 119.19958° W; WGS 84, uncertainty: 3 m. Skamokowa Vista Park. Shoreline and adjacent From 0.7 meters deep in lake to upland area adjacent to shoreline. man-made pit behind shoreline beach. Schoenoplectus acutus, Typha sp., and Juncus spp. dominant. Elev. 22 ft. Floating leaves absent; dominant aquatic vegetation; in water to 1 46.26966° N, 123.46208° W; WGS 84, meter deep. Phenology: Fruits. Origin: Native. uncertainty: 5 m. Disturbed shoreline of Columbia River; open; David Giblin 2405A 4 Sep 2008 sandy soil. Rooted in shallow water to 2 cm deep in sandy river bottom. Phenology: Fruits. WTU-380518 Origin: Native. Joe Arnett 2008-331 Potamogetonaceae with Cathy Maxwell Potamogeton nodosus Poir. 8 Sep 2008 U.S.A., WASHINGTON, ADAMS COUNTY: WTU-398646, WTU-V-005851 Herman Lake, along shoreline near boat ramp. Elev. 944 ft. 46.89746° N, 119.19958° W; WGS 84, uncertainty: 3 m. Potamogetonaceae From 0.7 meters deep in lake to upland area adjacent to shoreline. Schoenoplectus acutus, Typha sp., and Juncus spp. dominant. Potamogeton richardsonii (A. Benn.) Rydb. Floating leaves absent; dominant aquatic vegetation; in water to 1 meter deep. Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, WAHKIAKUM COUNTY: David Giblin 2405B 4 Sep 2008 Julia Butler Hansen Refuge for Columbian White-tailed Deer. Steamboat Slough; bank of WTU-380523 Columbia River just off road. Elev. 22 ft. 46.24875° N, 123.43319° W; WGS 84 Potamogetonaceae Freshwater intertidal zone adjacent to road and disturbed roadside edge. Scattered in muddy Potamogeton crispus L. river bottom. Phenology: Vegetative. Origin: Native. U.S.A., WASHINGTON, GRANT COUNTY: Turnout east side of road along Morgan Lake Road. David Giblin 2508 Elev. 826 ft. with Cathy Maxwell, Joe Arnett 46.91834° N, 119.23901° W; WGS 84, uncertainty: 6 m. Riparian corridor in basalt rimrock canyon dominated by 8 Sep 2008 Schoenoplectus acutus, Solidago sp., and Bassia hyssopifolia. Locally common in water to 0.5 meters deep near edge of stream. WTU-399923, WTU-V-006212 Phenology: Vegetative. Origin: Introduced. David Giblin 2480 5 Sep 2008 WTU-380467 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton pusillus L. U.S.A., WASHINGTON, KITTITAS COUNTY: U.S.A., OREGON, HARNEY COUNTY: Near fish screen in West Side Irrigation Canal, about 3 miles Malheur National Wildlife Refuge. Diamond Lane; approximately 1 northwest of Thorp. kilometer from junction with Highway 205. Elev. 1685 ft. Elev. 4162 ft. 47° 5.715' N, 120° 42.309' W; T19N R17E S34; WGS 84 43° 2.7' N, 118° 50.5' W; WGS 84, Source: GPS Rather deep flowing water. Other plants: Elodea canadensis, Canal and adjacent banks; canal water depth to 1.5m. Common in Ranunculus aquatilis, Populus trichocarpa, Prunus virginiana. Fruit; water to 1.5m deep. Phenology: Vegetative. Origin: Native. common. Phenology: Fruits. Origin: Native. David Giblin 1060 22 Jul 2007 Don Knoke 1990 6 Sep 2009 WTU-386216 WTU-380223 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton berchtoldii Fieber U.S.A., OREGON, HARNEY COUNTY: U.S.A., WASHINGTON, KITTITAS COUNTY: Malheur National Wildlife Refuge. Diamond Lane; approximately 1 Pond along North Thorp Highway about 250 yards east of bridge kilometer from junction with Highway 205. over Yakima River. Elev. 4162 ft. Elev. 1702 ft. 43° 2.7' N, 118° 50.5' W; WGS 84, Source: GPS 47.10021° N, 120.69725° W; T19N R17E S34; WGS 84, Canal and adjacent banks; canal water depth to 1.5m. Common in uncertainty: 11 m. water to 1.5m deep. Phenology: Fruits. Origin: Native. Fresh, standing water. Other plants: Potamogeton natans, Populus trichocarpa, Cornus stolonifera, Typha latifolia. Fruit; common; David Giblin 1061 22 Jul 2007 submersed. Phenology: Fruits. Origin: Native. WTU-393795 Don Knoke 1991 7 Sep 2009 WTU-380222 Potamogetonaceae Potamogeton epihydrus Raf. Potamogetonaceae U.S.A., OREGON, HARNEY COUNTY: Potamogeton epihydrus Raf. Malheur National Wildlife Refuge. Canal and adjacent wetland along side road; about 0.1 mile North of milepost 54. U.S.A., OREGON, HARNEY COUNTY: Elev. 4165 ft. Near Knox Pond. 42° 53.3' N, 118° 53.9' W; WGS 84, Source: GPS Elev. 4182 ft. Slow moving canal that spreads to form muck wetland. Common in 42° 53.5' N, 118° 52.9' W slow-moving water. Phenology: Vegetative. Origin: Native. Muddy ditch and adjacent channel, over volcanic bedrock. Common in shallow water, with floating leaves. Phenology: Fruits. Origin: David Giblin 1073 22 Jul 2007 Native. WTU-393790 Peter Zika 23226 22 Jul 2007 with J. Smith, D. Mansfield, D. Giblin Potamogetonaceae WTU-386178 Potamogeton epihydrus Raf. Potamogetonaceae U.S.A., OREGON, CURRY COUNTY: Potamogeton nodosus Poir. Floras Lake State Park, west side of lake. Elev. 10 ft. U.S.A., OREGON, HARNEY COUNTY: T31S R15W S17; NAD 27, uncertainty: 805 m., Source: TRS2LL, Malheur National Wildlife Refuge. Diamond Lane; approximately 1 Georef'd by Ben Legler kilometer from junction with Highway 205. Pool in bog at lake edge. Everything in the pool is covered with slimy Elev. 4162 ft. rust-colored growth. Associated with Callitriche, Eleocharis 43° 2.7' N, 118° 50.5' W; WGS 84, Source: GPS acicularis, E. palustris, Elodea densalsoetes, Myriophyllum Canal and adjacent banks; canal water depth to 1.5m. Common in hippuroides, Potamogeton epihydrus, P. natans, Scirpus pungens, water to 1.5m deep. Phenology: Flowers & Fruits. Origin: Native. Sparaganium, Utricularia vulgaris. Bog surrounding ponds dominated by Carex obnupta, Potentilla pacifica, Sphagnum. David Giblin 1059 22 Jul 2007 Submerged to floating. Phenology: Fruits. Origin: Native. WTU-386215 Barbara L. Wilson 9010 20 Aug 1997 with Bruce Newhouse WTU-379648 Potamogetonaceae Potamogetonaceae Stuckenia filiformis (Pers.) Börner Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., OREGON, DESCHUTES COUNTY: U.S.A., WASHINGTON, WAHKIAKUM COUNTY: [locality and coordinates withheld; status in Oregon: S3 (Rare; Northeast side of Steamboat Slough Road, 100 meters northwest of OBIC)] boatramp; near Cathlament Channel, north side of Columbia River. Elev. 6380 ft. Elev. 16 ft. At mouth of small bay. Rhizomatous; washed ashore. Phenology: 46° 15.3' N, 123° 26.1' W; T9N R6W S16 Vegetative. Origin: Native. Pool, in deep soft mud with Potamogeton crispus, Potamogeton zosteriformis, small wetland, fresh water intertidal, full sun. Floating P. F. Zika 15335 11 Aug 2000 aquatic. Phenology: Fruits. Origin: Native. WTU-379414 P. F. Zika 17750 29 Aug 2002 Potamogetonaceae WTU-379219 Stuckenia filiformis (Pers.) Börner Potamogetonaceae U.S.A., OREGON, DESCHUTES COUNTY: [locality and coordinates withheld; status in Oregon: S3 (Rare; Potamogeton crispus L. OBIC)] Elev. 6330 ft. U.S.A., WASHINGTON, WAHKIAKUM COUNTY: Near dam. Rhizomatous. Phenology: Fruits. Origin: Native. Northeast side of Steamboat Slough Road, 100 meters northwest of boatramp; near Cathlament Channel, north side of Columbia River. P. F. Zika 15332 11 Aug 2000 Elev. 16 ft. 46° 15.3' N, 123° 26.1' W; T9N R6W S16 WTU-379415 Small wetland, fresh water intertidal, full sun. Floating aquatic, pool, in deep soft mud, with Potamogeton zosteriformis, Potamogeton Potamogetonaceae richardsonii. Phenology: Flowers & Fruits. Origin: Introduced. Potamogeton richardsonii (A. Benn.) Rydb. P. F. Zika 17748 29 Aug 2002 with F. Weinmann CANADA, BRITISH COLUMBIA: Harrison River, along Rt. 7, at turnoff for Hemlock Valley Ski Resort, WTU-379218 Harrison Mills, BC. 49° 15' N, 121° 58' W Floating in edge of Harrison River. Phenology: Vegetative. Origin: Potamogetonaceae Native. Potamogeton alpinus Balbis Gerald B. Straley 6270 8 Sep 1990 U.S.A., WASHINGTON, KITTITAS COUNTY: WTU-375939 Okanogan-Wenatchee National Forest. Rocky Run Road, frontage road on north side of Interstate 90. Disturbed logging road area and Potamogetonaceae adjacent beaver ponds. Elev. 2528 ft. Stuckenia pectinata (L.) Borner 47.39241° N, 121.38376° W; WGS 84, uncertainty: 5 m. U.S.A., OREGON, LANE COUNTY: Dry, open, gravelly disturbed area adjacent to Along State Highway 126, about 2.5 miles east of Florence at Salix marsh flooded by recent beaver activity. junction with Hill Road. Single stem floating free. Phenology: Elev. 15 ft. Vegetative. Origin: Native. T18S R11W S20; NAD 27, uncertainty: 805 m., Source: TRS2LL, Georef'd by Ben Legler Don Knoke 1710 Plant submerged in tidal channel with Zostera, algea. Phenology: with Jim Duemmel, David Giblin Vegetative. Origin: Native. 19 Sep 2008 Richard R. Halse 5672 29 Sep 1999 WTU-400971, WTU-V-007671 WTU-379164

Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton illinoensis Morong U.S.A., WASHINGTON, WAHKIAKUM COUNTY: U.S.A., OREGON, HARNEY COUNTY: Northeast side of Steamboat Slough Road, 100 meters Northwest of Fish Lake Campground, Steens Mountain. boatramp; south side of Cathlamet Channel, North side of Columbia Elev. 7396 ft. River. 42° 44.337' N, 118° 38.595' W; WGS 84 Elev. 3 ft. Lake shore. Wet soil and aquatic plants. Submerged aquatic; 46° 15.3' N, 123° 26.1' W; T9N R6W S16 collected as flotsam. Phenology: Flowers. Origin: Native. Floating aquatic, pool, in deep soft mud, with Potamogeton crispus, P. richardsonii, small wetland, fresh waster intertidal, full sun. Brianne Cohen 2007-8 21 Jul 2007 Phenology: Vegetative. Origin: Native. with Dick Olmstead, Sheila Olmstead Peter F. Zika 17749 29 Aug 2002 WTU-392559 with Weinmann, F. WTU-379217 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Stuckenia pectinata (L.) Borner U.S.A., OREGON, HARNEY COUNTY: RUSSIAN FEDERATION, SAKHALIN REGION: Knox Pond Road, north side, off Central Patrol Road, outside Southern part of Sakhalin Island. Sea of Okhotsk side. Environs of Frenchglen. Starodubskoye Village and mouth of Nayba River. In drainage ditch. Phenology: Flowers & Fruits. Origin: Native. Elev. 0 ft. 47° 26' 47.6" N, 142° 44' 20.3" E James Rodman 535 21 Jul 2007 Coastal bog. Dominant vegetation Carex, sedges, Myrica and with Ken Karol, Yaowu Yuan Sphagnum. Scattered Larix. In flower and seed. In brackish water. Phenology: Fruits. Origin: Native. WTU-393789 Suzanne Joneson 2906 23 Jul 2001 with Valentina Tslenko Potamogetonaceae WTU-391078 Potamogeton friesii Rupr. U.S.A., WASHINGTON, OKANOGAN COUNTY: Potamogetonaceae Northeast shore of Forde Lake. Elev. 1574 ft. Potamogeton natans L. 48° 44.2' N, 119° 40.2' W; T37N R25E S3 In shallow water near boat ramp, with Potamogeton foliosus, P. RUSSIAN FEDERATION, SAKHALIN REGION: pusillus, Utricularia vulgaris. Sterile aquatic. Phenology: Vegetative. Southern part of Sakhalin Island. Approximately 34 kilometers Origin: Native. southwest of Yuzhno-Sakhalinsk; Lyutoga River valley, just downstream from Vysokoye village. Peter F. Zika 17921 20 Sep 2002 Elev. 193 ft. 46° 48.658' N, 142° 20.804' E WTU-380230 Large pond surrounded by Salix. In flower. Very common in pond. Phenology: Flowers. Origin: Native. Potamogetonaceae Suzanne Joneson 2918 25 Jul 2001 Potamogeton pusillus L. WTU-391088 U.S.A., WASHINGTON, WHATCOM COUNTY: Southeast shore of Lake Terrill, 6 kilometers west-northwest of Potamogetonaceae Ferndale. Elev. 196 ft. Potamogeton gramineus L. 48° 51.8' N, 122° 40.8' W; T39N R1E S22 1-2 meters of water, with Vallisneria, Potamogeton amplifolius, P. RUSSIAN FEDERATION, SAKHALIN REGION: illinoensis. Common. Phenology: Flowers & Fruits. Origin: Native. Southern part of Sakhalin Island. Approximately 34 kilometers southwest of Yuzhno-Sakhalinsk; Lyutoga River valley, just P. F. Zika 16418 25 Jul 2001 downstream from Vysokoye village. with F. Weinmann Elev. 193 ft. 46° 48.658' N, 142° 20.804' E WTU-380283 Large pond surrounded by Salix. In flower. Dimorphic leaves. Very common in pond. Phenology: Flowers. Origin: Native. Potamogetonaceae Suzanne Joneson 2919 25 Jul 2001 Potamogeton nodosus Poir. WTU-391087 U.S.A., WASHINGTON, GRANT COUNTY: Potholes Wildlife Area. Drainage slough west side of road, south Potamogetonaceae side of slough. From roadside to 2 kilometers west of road. Elev. 314 m. Stuckenia pectinata (L.) Borner 47.08172° N, 119.34336° W; WGS 84, uncertainty: 5 m. Shallow water of slough and adjacent sandy embankment up to 50 RUSSIAN FEDERATION, SAKHALIN REGION: meters in from slough. Moisture gradient from saturated to dry and Northeast part of Sakhalin Island. Sea of Okhotsk side. North part of alkaline. Growing in shallow water of slough. Phenology: Fruits. Odoptu Lake, east of town of Tungor. Origin: Native. Elev. 39 ft. 53° 25.979' N, 143° 8.174' E David Giblin 2329 29 Aug 2008 Boggy area with ponds. Low vegetation with Myrica, Ledum and Juncus dominant. Iris and Pinus pumila occasional. In flower and WTU-398802 bud. Aquatic. Common. Phenology: Flowers & Fruits. Origin: Native. Suzanne Joneson 3043 3 Aug 2001 WTU-390658 Potamogetonaceae Potamogetonaceae Potamogeton perfoliatus L. Potamogeton berchtoldii Fieber RUSSIAN FEDERATION, SAKHALIN REGION: RUSSIAN FEDERATION, SAKHALIN REGION: Northwestern tip of Sakhalin Island. Sakhalinsky Bay. Environs of Sakhalin Island, central part of island; along east side of the Orlovka Sladkoye Lake. Northeast corner of lake. River circa 25 kilometers west of town of Smirnykh and 4 kilometers Elev. 0 ft. southeast of mouth of Ognannaya River. 53° 25.929' N, 141° 56.904' E Elev. 262 ft. Sandy beach and mixed forest of Populus, Pinus pumila and Larix. 49° 43' 46.62" N, 142° 31' 27.36" E Washed up on shore of lake. Common. In fruit. Phenology: Fruits. Swamp with mosaic of dense Carex vesicata patches and open Origin: Native. muddy areas, also with Lysichiton, Potamogeton, Betula. In dense mats in drying pool; in fruit. Phenology: Fruits. Origin: Native. Suzanne Joneson 3253A 11 Aug 2001 Ben Legler 905 26 Jul 2003 WTU-391504 Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton perfoliatus L. RUSSIAN FEDERATION, SAKHALIN REGION: Northwestern tip of Sakhalin Island. Sakhalinsky Bay. Environs of RUSSIAN FEDERATION, SAKHALIN REGION: Sladkoye Lake. Northeast corner of lake. Sakhalin Island, central part; 10.5 kilometers southwest of Nogliki on Elev. 0 ft. east side of lower Tym River circa 1 kilometer upstream of mouth of 53° 25.929' N, 141° 56.904' E Parkata River. Sandy beach and mixed forest of Populus, Pinus pumila and Larix. Elev. 66 ft. Washed up on shore of lake. Common. In fruit. Phenology: Fruits. 51° 38' 59.64" N, 142° 58' 37.98" E Origin: Native. Shallow lakes and ponds along river, surrounded by extensive marshes and Alnus/Salix thickets. Submerged in circa 30 Suzanne Joneson 3253B 11 Aug 2001 centimeters of water in lake. Phenology: Fruits. Origin: Native. WTU-391500 Ben Legler 1084 3 Aug 2003 Herbarium: WTU Potamogetonaceae Potamogeton obtusifolius Mertens & W.D.J. Koch Potamogetonaceae RUSSIAN FEDERATION, SAKHALIN REGION: Potamogeton natans L. Northeast part of island. East of Piltun Village. Near southern end of Astokh Bay. U.S.A., WASHINGTON, YAKIMA COUNTY: Elev. 0 ft. Pond at junction of Fort Road and Lateral "C" Road. Southwest 52° 41.94' N, 143° 19.214' E quadrant of intersection. Marine waters. Floating by boat, approximately 100 meters from Elev. 813 ft. shore. Phenology: Vegetative. Origin: Native. 46.37496° N, 120.52244° W; WGS 84, uncertainty: 5 m. Pond apparently formed by irrigation runoff. Ulmus pumila dominant Suzanne Joneson 3572B 18 Aug 2001 overstory with Phalaris and Schoenoplectus acutus along shoreline. Common in water to 1 meter deep; leaves floating on water surface. WTU-391015 Phenology: Fruits. Origin: Native. David Giblin 3092 13 Aug 2009 Potamogetonaceae with Don Knoke Potamogeton alpinus Balbis WTU-388623 U.S.A., ALASKA COUNTY: Revillagigedo Island. Carroll Inlet, east of Shoal Potamogetonaceae Cove. Elev. 300 ft. Potamogeton foliosus Raf. 55.4255° N, 131.2693° W; WGS 84 Sluggish stream channel in tall sedge fen/bog U.S.A., WASHINGTON, YAKIMA COUNTY: complex. Stream deep and about 8 feet wide. Unnamed pond at intersection of highways 12 Growing on stream bank. Phenology: Flowers. and 410. Southwest quadrant of intersection. Origin: Native. Elev. 1607 ft. 46.7473° N, 120.78849° W; WGS 84, Phyllis Woolwine 237 uncertainty: 5 m. Shallow pond to 1.5 meters deep with Typha 29 Jul 1997 dominant along the periphery. Locally common in shallow water to 40 centimeters deep. WTU-408441, WTU-V-022572 Phenology: Vegetative. Origin: Native. David Giblin 3107 with Don Knoke 14 Aug 2009 WTU-388638, WTU-V-032319 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, YAKIMA COUNTY: U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: Toppenish National Wildlife Refuge. Area near maintenance One mile downstream and 0.25 miles upstream along Chehalis River entrance from Highway 97. at Porter. Elev. 721 ft. Elev. 50 ft. 46.30806° N, 120.33533° W; WGS 84, uncertainty: 5 m. 46.943731°, -123.318704°; WGS 84, uncertainty: 1500 m., Riparian strip dominated by Salix exigua and Phalaris arundinacea; Source: Digital Map, Georef'd by Joseph Stormer adjacent shrub-steppe. Scattered in shallow water of creek. Green alga dense in many portions. Stream bed varying from rocky Phenology: Vegetative. Origin: Introduced. to sandy mud. Associated species: Eleocharis palustris, Potamogeton robbinsii, Ranunculus subrigidus, Elodea canadensis, Don Knoke 1946 13 Aug 2009 and Scirpus validus. In slow moving water; denselyl distributed. One with David Giblin plant 6 feet long. No macrophytes; collected in water less than 10 feet. Phenology: Vegetative. Origin: Native. WTU-393098 H. Bobisud 1145 10 Jun 1973 Potamogetonaceae WTU-384545 Stuckenia pectinata (L.) Borner Potamogetonaceae U.S.A., WASHINGTON, YAKIMA COUNTY: Toppenish National Wildlife Refuge. Area near maintenance Potamogeton natans L. entrance from Highway 97. Elev. 721 ft. U.S.A., WASHINGTON, OKANOGAN COUNTY: 46.30806° N, 120.33533° W; WGS 84, uncertainty: 5 m. Small pond circa 14 miles north of Nespelem on Highway 155. Riparian strip dominated by Salix exigua and Phalaris arundinacea; Elev. 3000 ft. adjacent shrub-steppe. Common in shallow water of creek; all leaves T32N R29E; WGS 84, uncertainty: 5000 m., Source: Digital Map, submerged. Phenology: Fruits. Origin: Native. Georef'd by Crystal Shin Associated species: Typha latifolia, Potentilla palustris, Lemma Don Knoke 1947 13 Aug 2009 minor, Spirodela polyhiza, and Carex sp. In shallow water no more with David Giblin than 3-4 feet deep; red-brown in color; medium distribution. Phenology: Vegetative. Origin: Native. WTU-393097 H. Bobisud 1211 22 Jun 1973 Potamogetonaceae WTU-384534 Potamogeton richardsonii (A. Benn.) Rydb. Potamogetonaceae U.S.A., WASHINGTON, KITTITAS COUNTY: Washington Department of Fish and Wildlife Services area on Potamogeton berchtoldii Fieber Yakima River. 0.1 hectare pond at northwest corner of parking lot. Elev. 1239 ft. U.S.A., WASHINGTON, OKANOGAN COUNTY: 46.77645° N, 120.45351° W; WGS 84, uncertainty: 5 m. Pearygin Lake; Northwest end by public fishing area. Shallow water of pond to adjacent upland; area appears to have T35N R21E S36; NAD 27, uncertainty: 805 m., Source: TRS2LL, been disturbed in past. Scattered in water to one meter deep. Georef'd by Ben Legler Phenology: Vegetative. Origin: Native. Phenology: Vegetative. Origin: Native. Don Knoke 1974 14 Aug 2009 H. Bobisud 1239 26 Jun 1973 with David Giblin WTU-384539 WTU-393140 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogeton berchtoldii Fieber U.S.A., WASHINGTON, DOUGLAS COUNTY: U.S.A., WASHINGTON, KITTITAS COUNTY: Uppermost separate portion of Jameson Lake on east side of road. Washington Department of Fish and Wildlife Services area on T26N R26E; WGS 84, uncertainty: 3144 m., Source: Digital Map, Yakima River. 0.1 hectare pond at northwest corner of parking lot. Georef'd by Joseph Stormer Elev. 1239 ft. This portion of lake circa 20 acres and 5-6 feet deep at most. 46.77645° N, 120.45351° W; WGS 84, uncertainty: 5 m. Vegetation along bottom very dense. Associated species: Scirpus Shallow water of pond to adjacent upland; area appears to have maritimus, S. americanus, Ranunculus subrigidus, Myriophyllum been disturbed in past. Locally common in water to 40 centimeters spicatum, and Zannichellia palustris. Medium to densely distributed. deep. Phenology: Fruits. Origin: Native. Water sample taken here. Phenology: Flowers. Origin: Native. Don Knoke 1975 14 Aug 2009 H. Bobisud 1191 20 Jun 1973 with David Giblin WTU-384526 WTU-393139 Potamogetonaceae Potamogetonaceae Stuckenia pectinata (L.) Borner Potamogeton distinctus A. Benn. U.S.A., WASHINGTON, FRANKLIN COUNTY: RUSSIAN FEDERATION, SAKHALIN REGION: Scooteney Park Reservoir, about 15 miles south of Othello on Kuril Islands: Onekotan Island. Highway 17. 49.5°, 154.5°; WGS 84, Source: Georeferenced, Georef'd by WTU 46.691555°, -119.027018°; WGS 84, uncertainty: 3601 m., Staff Source: Digital Map, Georef'd by Joseph Stormer Foliage and inflorescences bronze-green. Phenology: Flowers & Small pond not attached to reservoir. Associates: Artemisia Fruits. Origin: Native. tridentata, Agropyron sp. (LB 4075). Phenology: Vegetative. Origin: Native. Sarah Gage 5868 24 Jul 1999 with Kemper Kurowski, Noboru Minakawa H. Bobisud 1106 23 May 1973 WTU-392122 WTU-384524 Potamogetonaceae Potamogetonaceae Potamogeton praelongus Wulfen Potamogeton perfoliatus L. U.S.A., WASHINGTON, THURSTON COUNTY: RUSSIAN FEDERATION, SAKHALIN REGION: South side of Lawrence lake, vicinity of public fishing area, circa South central Kunashir Island. Lake Peschanoye, on the 15-20 miles east of Tenino. Sernovdskiy isthmus. Elev. 421 ft. 43° 54.53' N, 145° 38.72' E With Iris pseudoacorus, Nymphaea odorata, Scirpus acutus, River draining southeastern part of Lake Peschanoye. Leaves green, Eleocharis palustris, Potamogeton crispus, and Sagittaria latifolia. In stems whitish. Inflorescences emergent. Phenology: Flowers. Origin: lake circa 500 acres. Medium distribution. Phenology: Vegetative. Native. Origin: Native. Sarah Gage 6356 17 Aug 1999 H. Bobisud 1153 11 Jun 1973 WTU-392084 WTU-384523 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton gramineus L. U.S.A., WASHINGTON, ADAMS COUNTY: U.S.A., OREGON, DESCHUTES COUNTY: Lyle Lake. Deschutes River, circa 2 miles above Dillon Falls. Slough pond. Elev. 941 ft. Associated with Callitriche verna, Eleocharis acicularis, Equisetum 46.89534° N, 119.20297° W; WGS 84, uncertainty: 3 m. fluviatile, Polygonum ampibium, Potamogeton nations, P. Lake in basalt rimrock surrounded by shrub-steppe; shoreline richardsonii. In circa 8 decimeters water. Floating leaves glossy. dominated by Schoenoplectus acutus, Bulboschoenus sp. Scattered Phenology: Vegetative. Origin: Native. in water up to 0.75 meters deep. Phenology: Flowers. Origin: Native. Joy Mastrogiuseppe 9192 19 Aug 1993 David Giblin 2432 5 Sep 2008 with Gary Milano, Kathleen Cook. WTU-387683 WTU-385748 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton robbinsii Oakes U.S.A., WASHINGTON, ADAMS COUNTY: U.S.A., OREGON, DESCHUTES COUNTY: Lyle Lake. Southwest corner of Little Cultus Lake; 20.8 miles west-northwest of Elev. 941 ft. LaPine. 46.89534° N, 119.20297° W; WGS 84, uncertainty: 3 m. Elev. 4740 ft. Lake in basalt rimrock surrounded by shrub-steppe; shoreline UTM Zone 10, 590156E, 4850217N; NAD 83 dominated by Schoenoplectus acutus, Bulboschoenus sp. Common Shallow water near shore of lake. With Elodea canadensis, and abundant in water up to 2 meters deep; floating leaves present. Fontanalis sp. Phenology: Vegetative. Origin: Native. Phenology: Flowers. Origin: Native. R.E. Brainerd 1311 31 Oct 2008 David Giblin 2431 5 Sep 2008 with N. Otting WTU-387684 WTU-386038

Potamogetonaceae Potamogeton distinctus A. Benn. RUSSIAN FEDERATION, SAKHALIN REGION: Simushir Island. In small lake near bay. In fruit. Phenology: Fruits. Origin: Native. Suzanne Joneson 1346 8 Aug 1999 with Noboru Minakawa WTU-392023 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton friesii Rupr. U.S.A., WASHINGTON, ADAMS COUNTY: U.S.A., WASHINGTON, SNOHOMISH Columbia National Wildlife Refuge. McMannaman Lake. From south COUNTY: end of lake along shoreline to northwest corner where stream feeds Kellogg Lake northeast of Sultan. lake. 47.90229° N, 121.760902° W; WGS 84, Elev. 820 ft. uncertainty: 500 m., Source: Digital map 46.90818° N, 119.2288° W; WGS 84, uncertainty: 2 m. Small lake ringed by quaking mats of Lake in basalt rimrock dominated by Schoenoplectus acutus, Sphagnum, with Ledum groenlandicum, Kalmia Bulboschoenus sp., and Typha latifolia. Cirsium arvense invading microphylla, Rhynchospora alba, and small peripheral upland. Common in water to 1 meter deep. Phenology: conifers; lake shallows with Brasenia, Fruits. Origin: Native. Sparganium, Nuphar, and Myriophyllum. Leaves all submerged; plants common in 2 meter deep David Giblin 2469 5 Sep 2008 water. Phenology: Fruits. Origin: Native. WTU-387687 Ben Legler 12556 with David Giblin, Jeff Walker Potamogetonaceae 6 Sep 2012 Potamogeton foliosus Raf. WTU-417287, WTU-V-037104 U.S.A., WASHINGTON, SKAGIT COUNTY: Deception Pass State Park: Pass Lake, north Potamogetonaceae shore. Elev. 14 m. Potamogeton epihydrus Raf. 48.419203° N, 122.639403° W; WGS 84, uncertainty: 4 m., Source: GPS U.S.A., WASHINGTON, SNOHOMISH Forested shoreline with scattered patches of COUNTY: emergent Juncus. Floating in water, uncommon. Kellogg Lake northeast of Sultan. Phenology: Vegetative. Origin: Native. 47.90229° N, 121.760902° W; WGS 84, uncertainty: 500 m., Source: Digital map Jeff Walker 602 Small lake ringed by quaking mats of with David Giblin, Ben Legler Sphagnum, with Ledum groenlandicum, Kalmia microphylla, Rhynchospora alba, and small 6 Sep 2012 conifers; lake shallows with Brasenia, Sparganium, Nuphar, and Myriophyllum. A few WTU-417286, WTU-V-037105 leaves floating, most submerged; plants uncommon in several meter deep water. Phenology: Flowers & Fruits. Origin: Native. Potamogetonaceae Ben Legler 12557 with David Giblin, Jeff Walker Potamogeton natans L. 6 Sep 2012 U.S.A., WASHINGTON, SNOHOMISH COUNTY: WTU-417288, WTU-V-037103 Kellogg Lake northeast of Sultan. 47.90229° N, 121.760902° W; WGS 84, uncertainty: 500 m., Source: Digital map Potamogetonaceae Small lake ringed by quaking mats of Sphagnum, with Ledum groenlandicum, Kalmia Potamogeton richardsonii (A. Benn.) Rydb. microphylla, Rhynchospora alba, and small conifers; lake shallows with Brasenia, U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: Sparganium, Nuphar, and Myriophyllum. Broad Friends Landing. Access point at south side of Lake Quigg. leaves floating; linear leaves submerged; plants Elev. 16 ft. occasional in 2 meter deep water. Phenology: 46.94665° N, 123.63985° W; WGS 84, uncertainty: 5 m. Vegetative. Origin: Native. Freshwater intertidal zone bordered by parking area. Leaves floating on surface; rooted in water over 1 meter deep. Phenology: Fruits. Ben Legler 12549 Origin: Native. with David Giblin, Jeff Walker David Giblin 3165 1 Sep 2009 6 Sep 2012 WTU-392363 WTU-415142, WTU-V-032709 Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, WHATCOM COUNTY: U.S.A., WASHINGTON, FRANKLIN COUNTY: Northeast end of Baker Lake where Baker River enters lake; Scootenay Reservoir. Southeast area near boat northeast of Concrete. launch with Populus tremuloides trees. Elev. 761 ft. Elev. 283 m. 48° 44.527' N, 121° 34.086' W; WGS 84, Source: Digital map 46.69994° N, 119.0232° W; WGS 84, Extensive Sand, mud and gravel flats exposed by drawdown of lake; uncertainty: 5 m., Georef'd by Maria dry to saturated, with large patches of Ranunculus flammula, Juncus Yousoufian cf. supiriformis. Locally common in 0.5-1 meter deep water. [Mixed Lake shore edge dominated by Phalaris collection; filed under P. alpinus]. Phenology: Vegetative. Origin: arundinacea; adjacent shrub-steppe; water to 1 Native. meter deep. Common and abundant in water to 1 meter deep. Phenology: Vegetative. Origin: David Giblin 756 29 Sep 2006 Native. with Ben Legler David Giblin 3263 WTU-378358B 30 Sep 2009 Potamogetonaceae WTU-401345, WTU-V-8224 Potamogeton natans L. Potamogetonaceae U.S.A., WASHINGTON, SKAGIT COUNTY: Baker River Valley west of Baker Lake along the Baker Lake Road; Potamogeton nodosus Poir. ? 7.2 air miles north of Concrete. Elev. 1080 ft. U.S.A., WASHINGTON, FRANKLIN COUNTY: UTM Zone 10, 593540E, 5388514N; WGS 84, Source: Calc. from Scootenay Reservoir. Southeast area near boat UTM, Georef'd by Dan Post launch with Populus tremuloides trees. Ponded wetland that is former Thuja plicata swamp (cut stumps Elev. 283 m. present.) Growing in water 40 centimeters deep. Leaves floating and 46.69994° N, 119.0232° W; WGS 84, submersed. Phenology: Fruits. Origin: Native. uncertainty: 5 m., Georef'd by Maria Yousoufian R.E. Brainerd 1909 3 Aug 2011 Lake shore edge dominated by Phalaris with N. Otting arundinacea; adjacent shrub-steppe; water to 1 meter deep. Leaves broad; in water to 1 meter WTU-390200 deep. Phenology: Vegetative. Origin: Native. David Giblin 3265 Potamogetonaceae 30 Sep 2009 Potamogeton crispus L. WTU-401337, WTU-V-8233 U.S.A., WASHINGTON, FRANKLIN COUNTY: Scootenay Reservoir. Cattail Lake, south shore where gravel access road leads to lake. Potamogetonaceae Elev. 283 m. 46.70307° N, 119.01243° W; WGS 84, Potamogeton pusillus L. uncertainty: 5 m., Georef'd by Maria Yousoufian U.S.A., WASHINGTON, FRANKLIN COUNTY: Lake shore edge dominated by Typha sp. Scootenay Reservoir. Southeast area near boat Common along edge of lake. Phenology: launch with Populus tremuloides trees. Vegetative. Origin: Introduced. Elev. 283 m. 46.69994° N, 119.0232° W; WGS 84, David Giblin 3256 uncertainty: 5 m., Georef'd by Maria Yousoufian 29 Sep 2009 Lake shore edge dominated by Phalaris arundinacea; adjacent shrub-steppe; water to 1 WTU-400851, WTU-V-007367 meter deep. Phenology: Fruits. Origin: Native. David Giblin 3266 30 Sep 2009 WTU-401336, WTU-V-8234 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton pusillus L. U.S.A., WASHINGTON, MASON COUNTY: U.S.A., WASHINGTON, PIERCE COUNTY: Isabella Lake. Accessed by public park on Delight Park Road. Fort Lewis Military Base. Mackay Marsh. North Elev. 43 m. and west side of marsh. 47.17167° N, 123.10949° W; WGS 84, uncertainty: 5 m., Georef'd Elev. 67 m. by Maria Yousoufian 47.10407° N, 122.61662° W; WGS 84, Shoreline dominated by Salix sp. and Thuja plicata; lake margin to uncertainty: 5 m., Georef'd by Maria 80 centimeter depth. Scattered pieces that apparently floated in from Yousoufian elsewhere. Phenology: Vegetative. Origin: Native. Seasonally fluctuating pond/marsh dominated by Salix in the interior and Phalaris arundinacea David Giblin 3192 2 Sep 2009 along the periphery; center area with highly intact native plant communities broken by WTU-392858 pockets of tea-colored water to 1.5 meters deep. Locally common in open water to 1 meter deep. Phenology: Fruits. Origin: Native. Potamogetonaceae David Giblin 3037 Potamogeton zosteriformis Fernald 15 Jul 2009 U.S.A., WASHINGTON, MASON COUNTY: Isabella Lake. Accessed by public park on Delight Park Road. WTU-399111, WTU-V-005496 Elev. 43 m. 47.17167° N, 123.10949° W; WGS 84, uncertainty: 5 m., Georef'd by Maria Yousoufian Potamogetonaceae Shoreline dominated by Salix sp. and Thuja plicata; lake margin to 80 centimeter depth. Scattered pieces that apparently floated in from Potamogeton natans L. elsewhere. Phenology: Vegetative. Origin: Native. U.S.A., WASHINGTON, PIERCE COUNTY: David Giblin 3193 2 Sep 2009 Fort Lewis Military Base. Mackay Marsh. North and west side of marsh. WTU-392857 Elev. 67 m. 47.10407° N, 122.61662° W; WGS 84, uncertainty: 5 m., Georef'd by Maria Potamogetonaceae Yousoufian Seasonally fluctuating pond/marsh dominated Potamogeton robbinsii Oakes by Salix in the interior and Phalaris arundinacea along the periphery; center area with highly U.S.A., WASHINGTON, MASON COUNTY: intact native plant communities broken by Isabella Lake. Accessed by public park on Delight Park Road. pockets of tea-colored water to 1.5 meters deep. Elev. 43 m. Common and abundant in open water to 1 47.17167° N, 123.10949° W; WGS 84, uncertainty: 5 m., Georef'd meter deep. Phenology: Fruits. Origin: Native. by Maria Yousoufian Shoreline dominated by Salix sp. and Thuja plicata; lake margin to David Giblin 3038 80 centimeter depth. Scattered pieces that apparently floated in from elsewhere. Phenology: Vegetative. Origin: Native. 15 Jul 2009 David Giblin 3195 2 Sep 2009 WTU-399045, WTU-V-006009 WTU-392861 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton crispus L. U.S.A., WASHINGTON, PEND OREILLE COUNTY: U.S.A., WASHINGTON, KITTITAS COUNTY: Colville National Forest. Big Meadow Lake. Woodhouse Road Loop, about 1 kilometer east from junction with North side of lake. Canyon Road. Elev. 1030 m. Elev. 432 m. 48.7298° N, 117.5575° W; WGS 84, 46.94998° N, 120.51836° W uncertainty: 50 m., Source: Digital map, Farm pond dominated by Iris pseudacorus along margin and Georef'd by Maria Yousoufian Potamogeton natans in water to 1.5 meters deep. Scattered in water Lakeside edge dominated by Typha and Carex to 40 centimeters deep. Phenology: Vegetative. Origin: Introduced. with Nuphar and Potamogeton emergent. Phenology: Flowers. Origin: Native. Don Knoke 1999 5 Oct 2009 with David Giblin Russ Holmes 12-10 WTU-394684 22 Jul 2012 WTU-407821, WTU-V-021839 Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton crispus L. U.S.A., WASHINGTON, PEND OREILLE U.S.A., WASHINGTON, COWLITZ COUNTY: COUNTY: Island Park Recreation Area on north side of Colville National Forest. Big Meadow Lake. Area Lewis River along Highway 503. around dam/spillway. Elev. 14 m. Elev. 1030 m. 45.93921° N, 122.68172° W; WGS 84, 48.7282° N, 117.5632° W; WGS 84, uncertainty: 100 m., Source: GPS, Georef'd uncertainty: 50 m., Source: Digital map, by Maria Yousoufian Georef'd by Maria Yousoufian Riverbank with silty and gravelly areas; island in Shallow water to 50 centimeters deep and middle of river with Phalaris arundinacea and adjacent shoreline; shoreline disturbed in some Lotus corniculatus. Submerged in silty soil along areas. Stems long; leaves broadly lanceolate. north riverbank. Phenology: Vegetative. Origin: Phenology: Vegetative. Origin: Native. Native. Bill Swartz 12-14 Cathy Maxwell 13-74 22 Jul 2012 28 Aug 2013 WTU-408918, WTU-V-022237 WTU-409073, WTU-V-023023

Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton gramineus L. U.S.A., WASHINGTON, PEND OREILLE COUNTY: U.S.A., MONTANA, BEAVERHEAD COUNTY: Colville National Forest. Big Meadow Lake. Area Beaverhead-Deerlodge National Forest: small around dam/spillway. pond along Forest Service Road 381 on south Elev. 1030 m. side of Skinner Lake. 48.7282° N, 117.5632° W; WGS 84, Elev. 2257 m. uncertainty: 50 m., Source: Digital map, 45.172001° N, 113.511908° W; WGS 84, Georef'd by Maria Yousoufian uncertainty: 20 m., Source: GPS, Georef'd by Shallow water to 50 centimeters deep and Ben Legler adjacent shoreline; shoreline disturbed in some Shallow, muddy pond among Pinus contorta areas. Occasional in shallow water. Phenology: forest and meadows; muddy bottom. With both Vegetative. Origin: Native. floating and submerged leaves; growing in shallow water. Phenology: Vegetative. Bill Swartz 12-15 Ben Legler 12830 22 Jul 2012 17 Aug 2013 WTU-408917, WTU-V-022238 WTU-403681, WTU-V-012096 Potamogetonaceae Potamogeton amplifolius Tuck. Potamogetonaceae U.S.A., WASHINGTON, COWLITZ COUNTY: Potamogeton pusillus L. Kress Lake, just east of Interstate-90. Elev. 10 m. U.S.A., WASHINGTON, COWLITZ COUNTY: 46.0462° N, 122.8531° W; WGS 84, Merrill Lake. Area from boat ramp north for uncertainty: 20 m., Source: GPS, Georef'd by approximately 0.5 kilometers. Maria Yousoufian Elev. 445 m. Apparent man-made lake approximately 5 46.09384° N, 122.32014° W; WGS 84, hectares in size. Aquatic plant diversity low with uncertainty: 500 m., Source: GPS, Georef'd Potamogeton amplifolius, Myriophyllum by Maria Yousoufian spicatum, and Elodea nuttallii most common. Shoreline and adjacent riparian zone dominated Common and abundant in water near shoreline. by Salix, Carex spp., Cornus occidentalis, and Phenology: Fruits. Origin: Native. Ranunculus flammula; lake level appears to be drawn down during summer. Locally common David Giblin 5117 on lake bottom in water to 50 centimeters deep. with Cathy Maxwell, Peter Zika Phenology: Vegetative. Origin: Native. 28 Aug 2013 David Giblin 5093 with Cathy Maxwell, Peter Zika WTU-409046, WTU-V-023049 27 Aug 2013 WTU-409082, WTU-V-023012 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton alpinus Balbis U.S.A., WASHINGTON, COWLITZ COUNTY: U.S.A., WASHINGTON, COWLITZ COUNTY: Beaver Bay Park. West end of park to west of Lake McBride. Forest Service Road 8100. parking area. Elev. 790 m. Elev. 150 m. 46.1395° N, 122.2581° W; WGS 84, 46.0613° N, 122.2763° W; WGS 84, uncertainty: 200 m., Source: Digital map, uncertainty: 200 m., Source: GPS, Georef'd Georef'd by Maria Yousoufian by Maria Yousoufian Kalama River corridor and adjacent sandy flats; Large marsh and swamp land formed by lake Juncus ensifolius common and abundant draw-down; decomposing logs common; Typha throughout flats; north-facing riverbank with latifolia and Salix sitchensis common in upper Blechnum spicant and Gaultheria ovatifolia. area. Scattered in small stream draining area. Locally common in muck soil. Phenology: Phenology: Vegetative. Origin: Native. Vegetative. Origin: Native. Cathy Maxwell 13-11 Cathy Maxwell 13-32 with Peter Zika, David Giblin with Peter Zika, David Giblin 26 Aug 2013 27 Aug 2013 WTU-409083, WTU-V-023010 WTU-409089, WTU-V-023004

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton nodosus Poir. U.S.A., WASHINGTON, COWLITZ COUNTY: U.S.A., WASHINGTON, SKAMANIA COUNTY: Beaver Bay Park. West end of park to west of Swift Reservoir. Northeast end of reservoir. parking area. Parking area for boat launch and area west for Elev. 150 m. 0.5 kilometers along shoreline. 46.0613° N, 122.2763° W; WGS 84, Elev. 306 m. uncertainty: 200 m., Source: GPS, Georef'd 46.05321° N, 122.09754° W; WGS 84, by Maria Yousoufian uncertainty: 200 m., Source: GPS, Georef'd Large marsh and swamp land formed by lake by Maria Yousoufian draw-down; decomposing logs common; Typha Lake level draw down area with Carex spp. and latifolia and Salix sitchensis common in upper Persicaria hydropiperoides. Locally common area. Phenology: Fruits. Origin: Native. and abundant at water's edge; long rhizomatous. Phenology: Vegetative. Origin: Cathy Maxwell 13-11a Native. with Peter Zika, David Giblin Cathy Maxwell 13-59 26 Aug 2013 27 Aug 2013 WTU-409086, WTU-V-023011 WTU-409090, WTU-V-023009

Potamogetonaceae Potamogetonaceae Potamogeton epihydrus Raf. Potamogeton alpinus Balbis U.S.A., WASHINGTON, COWLITZ COUNTY: U.S.A., OREGON, GRANT COUNTY: Beaver Bay Park. West end of park to west of Blue Mountains, Malheur River at confluence with Summit Creek, parking area. 19.2 air miles east-southeast of Senecal. Elev. 150 m. Elev. 4825 ft. 46.0613° N, 122.2763° W; WGS 84, UTM Zone 11, 372902E, 4884111N; WGS 84 uncertainty: 200 m., Source: GPS, Georef'd 50 centimeters of water at river margin. With Ranunculus aquatilis. by Maria Yousoufian Phenology: Fruits. Origin: Native. Large marsh and swamp land formed by lake draw-down; decomposing logs common; Typha Nick Otting 3353 11 Sep 2011 latifolia and Salix sitchensis common in upper with Dick Brainerd area. Scattered in small stream draining area. Phenology: Vegetative. Origin: Native. WTU-396511 Cathy Maxwell 13-12 with Peter Zika, David Giblin 26 Aug 2013 WTU-409087, WTU-V-023013 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton pusillus L. U.S.A., OREGON, KLAMATH COUNTY: U.S.A., OREGON, DESCHUTES COUNTY: Wood River Wetland, 2 air miles south of Klamath Agency. Hosmer Lake Campground and vicinity. Elev. 4150 ft. Elev. 1518 m. UTM Zone 10, 587745E, 4715423N; WGS 84 43.96092° N, 121.7861° W; Source: GPS Submersed in slow-moving water in channel through marsh. With Wet meadow dominated by Carex and grasses Ranunculus aquatilis, Wolffia borealis, Lemna minor, Elodea. grading into lake shallows, bordered on upland Phenology: Fertile. Origin: Native. side by dry Pinus contorta woodland. Submersed in Hosmer Lake. Phenology: Fruits. R.E. Brainerd 2228 24 Jul 2013 Origin: Native. with N. Otting Suzanne Anderson 2013-38 WTU-396484 with Karen Petersen, Katie Messick, Sheila Olmstead, and R. Olmstead Potamogetonaceae 13 Jul 2013 Potamogeton epihydrus Raf. WTU-409569, WTU-V-023567 U.S.A., OREGON, GRANT COUNTY: Blue Mountains, Antelope Creek drainage, junction of Forest Roads 1601 and 587, 4.8 air miles east of Seneca. Potamogetonaceae Elev. 4800 ft. 44.12911° N, 118.8756° W Potamogeton foliosus Raf. 30 centimeters of water in eddy in small creek. With Potamogeton foliosus ssp. foliosus, Callitriche. Phenology: Fertile. Origin: Native. U.S.A., OREGON, GRANT COUNTY: Blue Mountains, Antelope Creek drainage, junction of Forest Roads Nick Otting 2973 26 Jul 2010 1601 and 587, 4.8 air miles east of Seneca. Elev. 4800 ft. WTU-396402 44.12911° N, 118.8756° W 30 centimeters of water in eddy in small creek. With Potamogeton epihydrus, Callitriche. Phenology: Fertile. Origin: Native. Potamogetonaceae Nick Otting 2972 26 Jul 2010 Potamogeton pusillus L. WTU-396692 U.S.A., OREGON, DESCHUTES COUNTY: Deschutes National Forest. Dillon Falls Day Recreation Area, at end of Forest Service Road Potamogetonaceae 600. Deschutes River. Elev. 1233 m. Potamogeton pusillus L. 43.9559° N, 121.41695° W; WGS 84, uncertainty: 100 m., Source: GPS U.S.A., MONTANA, GRANITE COUNTY: Streambank of Deschutes River and adjacent Lolo National Forest, Rock Creek Canyon. East wet meadow. Scattered in shallow water to 1 side of Forest Service Road 102. meter deep along edge of river. Phenology: 46.43056° N, 113.72664° W; WGS 84 Vegetative. Origin: Native. Broad meadow with dry areas of Pinus ponderosa to stagnant creek bordered by David Giblin 5048 saturated soils. Locally common in water to 20 centimeters deep in creek. Phenology: 13 Jul 2013 Vegetative. Origin: Native. WTU-409167, WTU-V-023238 Dan Paquette 08-23 with James Rodman 12 Jul 2008 Potamogetonaceae WTU-399769, WTU-V-006060 Potamogeton natans L. U.S.A., OREGON, DESCHUTES COUNTY: Hosmer Lake Campground and vicinity. Potamogetonaceae Elev. 1518 m. 43.96092° N, 121.7861° W; Source: GPS Potamogeton berchtoldii Fieber Wet meadow dominated by Carex and grasses grading into lake shallows, bordered on upland U.S.A., OREGON, HARNEY COUNTY: side by dry Pinus contorta woodland. [locality and coordinates withheld; status in Oregon: S3? (Rare?; Phenology: Flowers. Origin: Native. OBIC)] Elev. 4200 ft. Suzanne Anderson 2013-35 20 centimeters of water at reservoir edge. With Zannichellia with Karen Petersen, Katie Messick, Sheila palustris, Potamogeton crispus. Phenology: Fruits. Origin: Native. Olmstead, and R. Olmstead Nick Otting 3419 20 Jul 2012 13 Jul 2013 with Barb Wilson WTU-410846, WTU-V-025983 WTU-396802 Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton berchtoldii Fieber U.S.A., OREGON, HARNEY COUNTY: U.S.A., OREGON, LANE COUNTY: Blue Mountains, Sawmill Creek along Forest Road 45, 33.4 air miles [locality and coordinates withheld; status in northwest of Burns. Oregon: S3? (Rare?; OBIC)] Elev. 4675 ft. Elev. 3960 ft. UTM Zone 11, 284728E, 4849359N; WGS 84 Shallow pond. With Potamogeton gramineus. Emersed in 1 meter of water in deep pool. With Pinus ponderosa, Phenology: Fruits. Origin: Native. Lemna minor, Rosa woodsii. Phenology: Fruits. Origin: Native. R. E. Brainerd s.n. Nick Otting 3046 14 Sep 2010 17 Aug 2005 WTU-397472 WTU-400261, WTU-V-006755 Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae U.S.A., OREGON, BENTON COUNTY: Potamogeton pusillus L. Willamette Valley, Oak Creek drainage, Bald Hill farm, 3.3 air miles west-northwest of downtown Corvallis. U.S.A., OREGON, LINN COUNTY: Elev. 350 ft. Ikenick Creek bog, south of Willamette National UTM Zone 10, 473449E, 4935879N; WGS 84 Forest road 2672. Plants submersed in 75 centimeters of water in stock watering tank. Elev. 3383 ft. With Lemna minor, Agrostis. Phenology: Fruits. Origin: Native. 44.36989° N, 122.01648° W; WGS 84, uncertainty: 10 m., Source: Specimen Label Nick Otting 3442 27 Jul 2012 Rooted, submerged with fruits above the with Dick Brainerd surface, in deeper channel in bog. Phenology: Fruits. Origin: Native. WTU-397466 Barbara L. Wilson 17850 with Richard E. Brainerd, Nick Otting, Tanya Potamogetonaceae Harvey Potamogeton amplifolius Tuck. 6 Sep 2013 U.S.A., WASHINGTON, COWLITZ COUNTY: WTU-400548, WTU-V-006945 Silver Lake. 46.29583°, -122.7825°; WGS 84, uncertainty: 4567 m., Source: GeoLocate, Georef'd by Maria Yousoufian Phenology: Fertile. Origin: Native. Potamogetonaceae M. Loverna Wilson s.n. Jul 1991 Potamogeton berchtoldii Fieber WTU-397391 U.S.A., OREGON, GRANT COUNTY: [locality and coordinates withheld; status in Oregon: S3? (Rare?; OBIC)] Potamogetonaceae Elev. 4812 ft. Plant submerged in creek. Phenology: Fruits. Potamogeton foliosus Raf. Origin: Native. U.S.A., WASHINGTON, WHATCOM COUNTY: Barbara L. Wilson 16420 Pond on west side of Baker Lake Road with Nick Otting southwest of National Forest road 1142. Elev. 750 ft. 18 Aug 2010 48.73018° N, 121.66668° W; uncertainty: 7 m. WTU-401496, WTU-V-8649 Rooted and submerged except for fruit in a large pond in conifer forest, with Lemna minor. Phenology: Fruits. Origin: Native. Barbara L. Wilson 15823 with Richard E. Brainerd, Nick Otting 9 Aug 2009 WTU-399755, WTU-V-006029 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton ? U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WISCONSIN, WAUSHARA COUNTY: Hog Lake area. Approximately 0.5 kilometers North shore Pine Lake, Hancock. south of trailhead parking area for Hog Lake 44.132544°, -89.509792°; WGS 84, trail. uncertainty: 667 m., Source: Digital Map, Elev. 680 m. Georef'd by Maria Yousoufian 47.3771° N, 117.8112° W; WGS 84, Water edge, sandy beach (water level very low). uncertainty: 100 m., Source: Digital map Phenology: Vegetative. Origin: Unknown. Riparian zone at base of basalt outcropping and adjacent scabland and Pinus ponderosa forest. Clayton Haberman s.n. Phalaris arundinacea dominant in riparian zone. Locally common in slow moving water; leaves 5 Jul 2005 dimorphic; sterile. Phenology: Vegetative. Origin: Native. WTU-402732, WTU-V-010413 David Giblin 4167 23 May 2012 Potamogetonaceae WTU-414729, WTU-V-031756 Potamogeton illinoensis Morong U.S.A., WISCONSIN, WAUSHARA COUNTY: Potamogetonaceae Pine Lake, Hancock. 44.13008°, -89.509878°; WGS 84, Potamogeton natans L. uncertainty: 715 m., Source: GeoLocate, Georef'd by Maria Yousoufian U.S.A., MONTANA, DEER LODGE COUNTY: Open water, on surface. Phenology: Fruits. Beaverhead-Deerlodge National Forest. Along Origin: Native. trail to Pintler Meadows circa 1/2 mile from trailhead, at small, unnamed pond. Clayton Haberman s.n. Elev. 1991 m. 45.864291° N, 113.444788° W; WGS 84, 1 Jul 2003 uncertainty: 6 m., Source: GPS Small, clear pond in depression among WTU-402733, WTU-V-010416 lodgepole pine forest; muddy bottom. Leaves floating; common. Phenology: Flowers. Origin: Native. Potamogetonaceae J. P. Dufour 2014-38 Potamogeton epihydrus Raf. 12 Jul 2014 U.S.A., WISCONSIN, WAUSHARA COUNTY: WTU-414876, WTU-V-032294 Pine Lake (Hancock). 44.13008°, -89.509878°; WGS 84, uncertainty: 715 m., Source: GeoLocate, Potamogetonaceae Georef'd by Maria Yousoufian Open water. Phenology: Vegetative. Origin: Potamogeton natans L. Native. U.S.A., WASHINGTON, SKAMANIA COUNTY: Clayton Haberman s.n. Northwest side of Mount Adams. Horseshoe Lake. Elev. 1262 m. 1 Jul 2003 46° 18.601' N, 121° 34.053' W; Source: Field notes Adjacent pond. Phenology: Vegetative. Origin: Native. WTU-402706, WTU-V-010580 David Biek 04-106 5 Jul 2004 with Susan McDougall Potamogetonaceae Herbarium: WTU Potamogeton epihydrus Raf. Potamogetonaceae U.S.A., WASHINGTON, SKAMANIA COUNTY: Northwest side of Mount Adams. Bathtub Meadow. Potamogeton alpinus Balbis 46° 16.475' N, 121° 36.253' W; Source: Field notes Phenology: Fruits. Origin: Native. U.S.A., WASHINGTON, SKAMANIA COUNTY: Southwest side of Mount Adams. Swampy Meadow Creek. David Biek 04-341A 23 Sep 2004 Phenology: Flowers. Origin: Native. with Susan McDougall David Biek 04-248 18 Jul 2004 Herbarium: WTU with Susan McDougall Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton praelongus Wulfen U.S.A., WASHINGTON, SKAMANIA COUNTY: U.S.A., WASHINGTON, WHATCOM COUNTY: Southwest side of Mount Adams. Salt Creek Trail #75. Terrell Lake. Along east side of entrance road. Elev. 998 m. Elev. 60 m. 46° 7.459' N, 121° 35.31' W; Source: Field notes 48.85392° N, 122.68255° W; WGS 84, Phenology: Flowers. Origin: Native. uncertainty: 10 m., Source: Digital map Shallow water at edge of lake. Locally common, David Biek 05-137 25 Jul 2005 unrooted stems. Phenology: Vegetative. Origin: with Susan McDougall Native. Herbarium: WTU David Giblin 5492 19 Jan 2015 Potamogetonaceae WTU-418340, WTU-V-039350 Potamogeton gramineus L. U.S.A., WASHINGTON, SKAMANIA COUNTY: North side of Mount Adams. Muddy Meadows. Potamogetonaceae Elev. 1365 m. 46° 18.04' N, 121° 31.54' W; Source: Field notes Potamogeton natans L. Phenology: Flowers. Origin: Native. U.S.A., WASHINGTON, MASON COUNTY: David Biek 05-176 26 Jul 2005 Bog peatland approximately 1 kilometer south of with Susan McDougall Dewatto Bay Road. Elev. 120 m. Herbarium: WTU 47.4246° N, 123.03613° W; WGS 84, uncertainty: 200 m., Source: GPS Mix of Kalmia microphylla/Rhododendron Potamogetonaceae groenlandicum/Sphagnum bog and more open peatland with muddy to deep water channels; Potamogeton natans L. Juncus acuminatus and Rhynchospora alba common. Locally common in deep water pool. U.S.A., WASHINGTON, SKAMANIA COUNTY: Phenology: Fruits. Origin: Native. Southwest side of Mount Adams. Grand Meadow. Elev. 1244 m. Jeff Walker 803 46° 9.062' N, 121° 39.228' W; Source: Field notes with Peter Zika, David Giblin Phenology: Vegetative. Origin: Native. 24 Aug 2015 David Biek 05-189 27 Jul 2005 with Susan McDougall WTU-418150, WTU-V-039764 Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton gramineus L. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, SKAMANIA COUNTY: Northeast shore of Whistle Lake, Anacortes, Southwest side of Mount Adams. Grand Meadow. Fidalgo Island. Elev. 1244 m. Elev. 135 m. 46° 9.062' N, 121° 39.228' W; Source: Field notes 48.462° N, 122.604° W; Source: Specimen Phenology: Vegetative. Origin: Native. Label In 2 feet of water, with Najas, Utricularia David Biek 05-189A 27 Jul 2005 vulgaris, Potamogeton richardsonii. Floating with Susan McDougall leaves cordate, submerged leaves linear-oblong. Phenology: Fruits. Origin: Native. Herbarium: WTU Peter F. Zika 26428 30 Aug 2013 WTU-404200, WTU-V-012348 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton natans L. U.S.A., WASHINGTON, SKAGIT COUNTY: U.S.A., WASHINGTON, LEWIS COUNTY: Northeast shore of Whistle Lake, Anacortes, Mt. Adams Veneer Company Mill Pond on east Fidalgo Island. side of Road 25, 2.5 km due south of Randle. Elev. 135 m. Elev. 259 m. 48.462° N, 122.604° W; Source: Specimen 46.512712° N, 121.953542° W; WGS 84, Label uncertainty: 4 m., Source: GPS, Georef'd by In 2 feet of water, with Najas, Utricularia Ben Legler vulgaris, Potamogeton natans. Phenology: Man-made pond, rimmed by Spirea douglasii Fruits. Origin: Native. and Typha latifolia, with Nuphar polysepala, Potamogeton natans, Iris pseudacorus. Floating Peter F. Zika 26429 leaves broadly elliptic; submerged leaves filiform; plants frequent in shallow water. 30 Aug 2013 Phenology: Fruits. WTU-404199, WTU-V-012349 Ben Legler 13344 with Sara Legler Potamogetonaceae 22 Sep 2014 Potamogeton natans L. WTU-407729, WTU-V-021906 U.S.A., WASHINGTON, KITTITAS COUNTY: Northeast corner of I-90 interchange at south end of Cle Elum; pond formed from old borrow Potamogetonaceae pit. Elev. 575 m. Potamogeton crispus L. 47.09904° N, 120.69727° W; WGS 84, uncertainty: 10 m., Source: GPS U.S.A., WASHINGTON, LEWIS COUNTY: Shallow water pond to 2 meters deep with Exposed mud flats on east shore of Riffe Lake Typha latifolia and Lemna turionifera along edge near an acess parking area along Champion and Nuphar polysepala along surface of open Haul Road, 3.5 air km soutwest of Glenoma. water; also adjacent dry upland. Common and Elev. 225 m. abundant. Phenology: Vegetative. Origin: 46.488156° N, 122.186708° W; WGS 84, Native. uncertainty: 11 m., Source: GPS, Georef'd by Ben Legler Don Knoke 2346A Exposed mud flats created by reservoir with David Giblin drawdown, with small depression still filled with water. Leaves all submerged, with undulating 24 Sep 2012 margins; common in pool. Phenology: Vegetative. WTU-415132, WTU-V-032717 Ben Legler 13384 Potamogetonaceae with Sara Legler Potamogeton amplifolius Tuck. 23 Sep 2014 U.S.A., WASHINGTON, KITTITAS COUNTY: WTU-408068, WTU-V-021214 Approximately 2 kilometers east of junction of Leisure Land Lane and Iron Horse Trail; just southeast of I-90 Exit 80 interchange. Potamogetonaceae Elev. 606 m. 47.1779° N, 121.0054° W; WGS 84, Potamogeton nodosus Poir. uncertainty: 20 m., Source: Digital map Impounded ponds and riparian zone ephemeral U.S.A., WASHINGTON, LEWIS COUNTY: pond along edge of Pinus ponderosa and Exposed mud flats on east shore of Riffe Lake Populus trichocarpa forest; water level near an acess parking area along Champion fluctuations associated with nearby Yakima Haul Road, 3.5 air km soutwest of Glenoma. River. Scattered in water to 50 centimeters Elev. 225 m. deep. Phenology: Vegetative. Origin: Native. 46.488156° N, 122.186708° W; WGS 84, uncertainty: 11 m., Source: GPS, Georef'd by David Giblin 4252 Ben Legler with Don Knoke Exposed mud flats created by reservoir drawdown, with small depression still filled with 24 Sep 2012 water. Leaves dimorphic, the submerged ones narrower and longer with slightly undulating WTU-415268, WTU-V-032563 margins; plants abundant in pool. Phenology: Vegetative. Ben Legler 13385 23 Sep 2014 with Sara Legler WTU-408067, WTU-V-021213 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton nodosus Poir. U.S.A., WASHINGTON, LEWIS COUNTY: U.S.A., WASHINGTON, FRANKLIN COUNTY: Exposed mud flats on east shore of Riffe Lake Hanford National Wildlife Refuge. Wahluke Unit near an acess parking area along Champion Parking Area 4. Haul Road, 3.5 air km soutwest of Glenoma. Elev. 110 m. Elev. 225 m. 46.55334° N, 119.29939° W; WGS 84, 46.488156° N, 122.186708° W; WGS 84, uncertainty: 200 m., Source: GPS uncertainty: 11 m., Source: GPS, Georef'd by Semi-permanent pond and adjacent upland. Ben Legler Pond with Phragmites australis ssp. australis, Exposed mud flats created by reservoir Myriophyllum sp., and Lythrum salicaria. Locally drawdown, with small depression still filled with common in shallow water at south edge of pond. water. Leaves fully submerged; stems easily Phenology: Vegetative. Origin: Native. broken; common in pool. Phenology: Vegetative. David Giblin 5759 Ben Legler 13386 17 Sep 2015 with Sara Legler WTU-418306, WTU-V-039032 23 Sep 2014 WTU-408066, WTU-V-021216 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, GRANT COUNTY: Buckshot Recreation Area. Area west of hunting U.S.A., WASHINGTON, CLARK COUNTY: blind approximately 300 meters north of parking South bank of Lewis River at mouth of Cedar Creek, 10.5 air km area. ENE of Woodland. Elev. 145 m. Elev. 12 m. 46.71344° N, 119.95304° W; WGS 84, 45.935995° N, 122.618369° W; WGS 84, uncertainty: 6 m., uncertainty: 50 m., Source: Digital map Source: GPS, Georef'd by Ben Legler Backwater channel of Columbia River with Gravel bar with Persicaria, Phalaris, Lotus corniculatus. Leaves at Schoenoplectus acutus and Lythrum salicaria stem tip floating, thick and glossy relative to the linear submerged abundant. Common in water to 2 meters deep. leaves; plants forming a large patch in a small, quite backwater area Phenology: Fruits. Origin: Native. behind gravel bar. Phenology: Vegetative. David Giblin 5787 Ben Legler 13896 13 Sep 2015 18 Sep 2015 Herbarium: WTU WTU-418304, WTU-V-039033 Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae U.S.A., WASHINGTON, FRANKLIN COUNTY: Potamogeton nodosus Poir. Bailie Memorial Youth Ranch. Hendricks Road Access Point. U.S.A., WASHINGTON, GRANT COUNTY: Elev. 246 m. Buckshot Recreation Area. Area west of hunting 46.67112° N, 119.14845° W; WGS 84, blind approximately 300 meters north of parking uncertainty: 500 m., Source: GPS area. Shrub-steppe with Artemisia tridentata, Elev. 145 m. Chrysothamnus villosus, and Poa secunda; 46.71344° N, 119.95304° W; WGS 84, riparian zone dominated by Elaeagnus uncertainty: 50 m., Source: Digital map angustifolia with Lythrum salicaria and Backwater channel of Columbia River with Schoenoplectus acutus. Abundant in shallow Schoenoplectus acutus and Lythrum salicaria water along stream. Phenology: Vegetative. abundant. Common in water to 2 meters deep; Origin: Native. leaves floating on surface. Phenology: Vegetative. Origin: Native. David Giblin 5706 David Giblin 5794 16 Sep 2015 18 Sep 2015 WTU-418354, WTU-V-039251 WTU-418305, WTU-V-039035 Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton oakesianus J.W. Robbins U.S.A., WASHINGTON, ISLAND COUNTY: U.S.A., NEW YORK, SUFFOLK COUNTY: Deception Pass State Park. Cranberry Lake. Yaphank and Vicinity, Long Island, Pickerel Bay, Open water areas to southeast of swimming First Lake. area on west side of lake; from near shoreline to Reference specimen for illustration in Revision depth of two meters. of Flora of the Pacific Northwest WTU Elev. 1 m. Herbarium, 2016. Origin: Native. 48.3965° N, 122.6619° W; WGS 84, uncertainty: 100 m. E. L. Morris 11741 Aquatic areas to depth of two meters, with E. B. Chamberlain dominated by Potamogeton spp. and Nuphar polysepala. Common in water to 2 meters deep. 17 Sep 1911 Phenology: Vegetative. Origin: Native. WTU-660JWT, WTU-V-025118 David Giblin 3612 with Ben Legler, Jeff Walker 24 Aug 2010 Potamogetonaceae WTU-419038, WTU-V-041655 Potamogeton pusillus L. ? U.S.A., WASHINGTON, SKAGIT COUNTY: Skagit River Estuary on Puget Sound. Potamogetonaceae 48.30602° N, 122.3866° W; Source: GPS Tidal pools in high salt marsh in river delta. Potamogeton illinoensis Morong Growing with Callitriche stagnalis and surrounding pools were Carex lyngbyei and U.S.A., WASHINGTON, ISLAND COUNTY: Sium suave. Abundance: Sparse. Growth Habit: Deception Pass State Park. Cranberry Lake. Submerged aquatic herb. Site ID: Open water areas to southeast of swimming NWCA16-4872. Visit #1. Collection #U3 area on west side of lake; from near shoreline to (Unknown Species). Phenology: Vegetative. depth of two meters. Origin: Native. Elev. 1 m. 48.3965° N, 122.6619° W; WGS 84, Patricia Johnson NWCA16-4872-V1-U3 uncertainty: 100 m. Aquatic areas to depth of two meters, 23 Jun 2016 dominated by Potamogeton spp. and Nuphar polysepala. Common in water to 2 meters deep. WTU-411746, WTU-V-026275 Phenology: Vegetative. Origin: Native. David Giblin 3613 Potamogetonaceae with Ben Legler, Jeff Walker Potamogeton praelongus Wulfen 24 Aug 2010 U.S.A., WASHINGTON, PIERCE COUNTY: WTU-419039, WTU-V-041658 NE shore of Silver lake, near resort no S Silver lake Road E, Eatonville, 15.3 air km NW of Dobbs Mountain. Elev. 185 m. Potamogetonaceae 46.886° N, 122.361° W; Source: Specimen Label Potamogeton natans L. Uncommon, in shallow water; full sun, with Potamogeton zosteriformis, P. berchtoldii, P. U.S.A., WASHINGTON, ISLAND COUNTY: epihydrus, P. crispus, Elodea nuttallii, Najas Deception Pass State Park. Cranberry Lake. canadensis, Ceratophyllum echinatum. Wetland area on west side of lake just south of Submerged aquatic, leaf tips hooded, bathing area. uncommon. Origin: Native. Elev. 1 m. 48.3949° N, 122.6609° W; WGS 84, Peter F. Zika 28107 uncertainty: 100 m., Source: Digital map, Georef'd by Maria Yousoufian 16 Jul 2016 Wet meadow on edge of lake with Spiraea douglasii, Carex aquatilis and Sphagnum. WTU-409770, WTU-V-023695 Uncommon in beaver channels. Phenology: Vegetative. Origin: Native. Jeff Walker 522 with Ben Legler, David Giblin 24 Aug 2010 WTU-418931, WTU-V-041988 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton gramineus L. U.S.A., WASHINGTON, PIERCE COUNTY: U.S.A., ALASKA COUNTY: NE shore of Silver Lake, near resort on S Silver Dixon Entrance Quad.: Prince of Wales Island, Lake Road E, Eatonville, 15/3 air km NW of McLean Arm, north shore of west head of arm. Dobbs Mountain. 54° 48' 44" N, 132° 4' 6" W; Source: Elev. 185 m. Specimen Label 46.886° N, 122.361° W; Source: Specimen Taxus forest, muskeg pools, common, with Label floating leaves. Forest Service Alaska Region, Occasional in shallow water; full sun, with TNFS Herbarium v. 4145. Phenology: Fertile. Potamogeton praelongus, P. berchtoldii, P. Origin: Native. epihydrus, P. crispus, Elodea nuttallii, Najas canadensis, Ceratophyllum echinatum. M. C. Stensvold 6267 Submerged aquatic, flat stem, occasional in shallow water. Phenology: Vegetative. Origin: 13 Aug 1993 Native. WTU-408440, WTU-V-022573 Peter F. Zika 28106 16 Jul 2016 Potamogetonaceae WTU-409768, WTU-V-023696 Potamogeton foliosus Raf. Potamogetonaceae U.S.A., ALASKA COUNTY: Petersburg Quad.: Chief Shakes Hot Springs. Potamogeton foliosus Raf. Elev. 15 m. 56° 43' N, 132° 2' W; Source: Specimen U.S.A., WASHINGTON, KING COUNTY: Label S end of Lake Holm (=Neilson Lake), near SE Growing in hot springs. ALA V114781. Forest Lake Holm Road. Service Alaska Region, TNFS Herbarium, v. Elev. 120 m. 4826. Origin: Native. 47.3007° N, 122.1239° W; Source: Specimen Label M. Duffy 93-819 Occasional in 0.5 m of water; full sun, with Utricularia vulgaris, U/ gibba, Brasenia, Elodea 30 Jul 1993 canadensis, Myriophyllum spicatum. Submerged aquatic, occasional in 0.5 m of WTU-408439, WTU-V-022574 water. Origin: Native. Peter F. Zika 28127 Potamogetonaceae 18 Jul 2016 Potamogeton alpinus Balbis WTU-409766, WTU-V-023697 U.S.A., ALASKA COUNTY: Ketchikan Quad.: Princess Bay lake, east side of bay, east of banding cabin. Elev. 25 m. Potamogetonaceae 55° 23' 26" N, 130° 59' 30" W; Source: Specimen Label Potamogeton crispus L. In shallow water of freshwater lake. ALA V116405. Forest Service Alaska Region, TNFS U.S.A., WASHINGTON, SKAGIT COUNTY: Herbarium, v. 5184. Origin: Native. S shore of Lake Erie, near boat launch N of Rosario Road, 1.6 air km N of Ginnet Hill, J. DeLapp 93-567 Fidalgo Island. with M. Duffy Elev. 35 m. 48.4494° N, 122.6399° W; Source: Specimen 17 Jul 1993 Label In 0.5 m water, partial shade, with Alnus rubra, WTU-408438, WTU-V-022575 Najas canadensis, Nuphar, Lemna trisulca. Submerged aquatic, occasional. Phenology: Vegetative. Origin: Introduced. Peter F. Zika 28444 17 Sep 2016 WTU-412574, WTU-V-027083 Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton robbinsii Oakes U.S.A., ALASKA COUNTY: U.S.A., WASHINGTON, KING COUNTY: Petersburg Quad.: Figuer Eight Lake, Stikine Southeast end of Pipe Lake, near southeast River, eastern edge. 265th Place. Elev. 15 m. Elev. 165 m 56° 42' N, 132° 16' W; Source: Specimen 47.365° N, 122.053° W; Source: Specimen Label Label Shallow lake margin. ALA V114747. Forest In 0.5 meters of water, full sun, with Najas Service Alaska Region, TNFS Herbarium, v. canadensis, Potamogeton zosteriformis, P. 4757. Phenology: Fertile. Origin: Native. amplifolius. Aquatic rooted in mud, submerged leaves firm, 2-ranked, dark green; common. M. Duffy 93-781 Origin: Native. 29 Jul 1993 Peter F. Zika 28113 WTU-408437, WTU-V-022576 18 Jul 2016 WTU-409764, WTU-V-023699 Potamogetonaceae Potamogeton epihydrus Raf. Potamogetonaceae U.S.A., ALASKA COUNTY: Potamogeton crispus L. Craig Quad.: Prince of Wales Island, Island Point-Trollers Cove area, between point and U.S.A., WASHINGTON, PIERCE COUNTY: cove, northeast side of small narrow lake. Northeast shore of Silver Lake, near resort on Elev. 15 m. South Silver Lake Road East, Eatonville, 15.3 55° 22' 13" N, 132° 11' 14" W; Source: air kilometers northwest of Dobbs Mountain. Specimen Label Elev. 185 m. Floating near lake shore, forest margin at lake. 46.886° N, 122.361° W; Source: Specimen Forest Service Alaska Region, TNFS Label Herbarium, v. 5076. Origin: Native. Full sun, with Potamogeton zosteriformis, P. praelongus, P. berchtoldii, P. epihydrus, Elodea M. C. Stensvold 6165 nuttallii, Najas canadensis, Ceratophyllum echinatum. Submerged aquatic, uncommon in 10 Aug 1993 shallow water, flat stem, wavy leaf margins. Origin: Introduced. WTU-408436, WTU-V-022577 Peter F. Zika 28109 16 Jul 2016 Potamogetonaceae WTU-409763, WTU-V-023702 Potamogeton robbinsii Oakes U.S.A., WASHINGTON, THURSTON COUNTY: Potamogetonaceae Southeast shore of Deep Lake. Elev. 60 m. Potamogeton pusillus L. 46.907° N, 122.909° W; Source: Specimen Label U.S.A., WASHINGTON, SAN JUAN COUNTY: In 25 centimeters of water, full sun, with Northwest shore of unnamed pond, east side of Potamogeton praelongus, P. amplifolius, West Side Road, 1 air kilometer west northwest Elodea. Aquatic. Origin: Native. of Mount Dallas, San Juan Island. Elev. 75 m. Peter F. Zika 28000 48.5229° N, 123.1455° W; Source: Specimen Label 28 Jun 2016 In 1 meter of water, full sun, with Typha latifolia, Polygonum amphibium, Utricularia vulgaris, WTU-409767, WTU-V-023698 Lemna trisulca. Common submerged aquatic. Origin: Native. Peter F. Zika 28151 22 Jul 2016 WTU-409782, WTU-V-023789 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, KING COUNTY: Southeast end of Pipe Lake, near southeast Southeast end of Pipe Lake, near southeast 265th Place. 265th Place. Elev. 165 m. Elev. 165 m. 47.365° N, 122.053° W; Source: Specimen 47.365° N, 122.053° W; Source: Specimen Label Label In 0.5 meters of water, full sun, with Najas In 0.5 meter of water, full sun, with Najas canadensis, Potamogeton robbinsii, P. canadensis, Potamogeton robbinsii, P. zosteriformis. Aquatic rooted in mud, amplifolius. Aquatic rooted in mud, submerged submerged leaves arched, with 22 veins, leaves with 18 veins, stem flat, occasional. floating leaves with 28 veins; common. Tissue Origin: Native. removed for environmental DNA analysis studies by Lauren Kuehne at University of Peter F. Zika 28112 Washington July 2018 Origin: Native. 18 Jul 2016 Peter F. Zika 28111 WTU-409778, WTU-V-023796 18 Jul 2016 Potamogetonaceae WTU-409785, WTU-V-023790 Potamogeton natans L. Potamogetonaceae U.S.A., OREGON, DESCHUTES COUNTY: Potamogeton zosteriformis Fernald Near boat launch, southwest shore of Hosmer Lake, 0.8 air kilometers northwest of Red U.S.A., WASHINGTON, THURSTON COUNTY: Crater. South shore of Clear Lake, near Bald Hill Road, Elev. 1515 m. 4 air kilometers west southwest of Fossil Rock. 43.9593° N, 121.7887° W; Source: Specimen Elev. 160 m. Label 46.818° N, 122.4763° W; Source: Specimen In 1 meter of water, over volcanics, marshes, Label with Menyanthes, Lemna turionifera, Spirodela 0.5 meters of water, flat stem, full sun, with polyrrhiza. Floating aquatic, submerged leaves Potamogeton foliosus, Najas, Lemna trisulca. linear; common. Origin: Native. Submerged aquatic. Origin: Native. Peter F. Zika 28044 Peter F. Zika 28092 7 Jul 2016 16 Jul 2016 WTU-409850, WTU-V-023803 WTU-409781, WTU-V-023792 Potamogetonaceae Potamogetonaceae Potamogeton diversifolius Raf. Potamogeton crispus L. U.S.A., OREGON, DESCHUTES COUNTY: [locality and coordinates withheld; status in U.S.A., OREGON, DESCHUTES COUNTY: Oregon: S1 (Critically Imperiled; OBIC)] Mirror Lake, an impoundment on the Deschutes Elev. 1025 m. River, Drake Park, Bend. In shallow water marsh, over volcanics, with Elev. 1090 m. Ricciocarpus natans, Lemna turionifera, Typha 44.0598° N, 121.3177° W; Source: Specimen latifolia, Juncus balticus, Eleocharis acicularis, Label Sagittaria cuneata. Floating-leaved aquatic, On mucky bottom in 30-50 centimeters of water, some spikes in axils of linear submerged leaves; full sun, over volcanics, with Callitriche fassettii, locally common. Phenology: Fertile. Origin: Zannichellia, algae. Submerged aquatic, stem Native. flat, leaf margins wavy; occasional. Origin: Introduced. Peter F. Zika 28054 Peter F. Zika 28023 8 Jul 2016 5 Jul 2016 WTU-409815, WTU-V-023834 WTU-409776, WTU-V-023795 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., OREGON, DESCHUTES COUNTY: U.S.A., OREGON, DESCHUTES COUNTY: East side of Camp Polk Road near Golden Crooked River, 0.9 air kilometers north of Smith Stone Drive, 2.5 air kilometers northeast of Rock. McKinney Butte. Elev. 800 m. Elev. 950 m. 44.368° N, 121.146° W; Source: Specimen In 60 centimeter water; sunny west shore of Label artificial pond over volcanics, with Ranunculus 1 meter of water, over volcanics, with aquatilis, Eleocharis acicularis. Submerged Potamogeton crispus, Stuckenia pectinata, S. aquatic, common. Phenology: Fertile. Origin: filiformis. Submerged aquatic, drifting in current. Native. Origin: Native. Peter F. Zika 28072 Peter F. Zika 28006 9 Jul 2016 3 Jul 2016 WTU-409818, WTU-V-023835 WTU-409822, WTU-V-023839

Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton praelongus Wulfen U.S.A., OREGON, DESCHUTES COUNTY: U.S.A., OREGON, KLAMATH COUNTY: Crooked River, 0.9 air kilometers north of Smith Quiet bay of east shore of Boyle Reservoir on Rock. Klamath River, south side of Route 66 near Elev. 800 m. junction with Topsy Grade Road, 6.6 air 44.368° N, 121.146° W; Source: Specimen kilometers northeast of Hayden Mountain. Label Elev. 1160 m. 1 meter of water, over volcanics, with 42.135° N, 122.03° W; Source: Specimen Potamogeton richardsonii, Stuckenia pectinata, Label S. filiformis. Submerged aquatic, drifting in Drifted to gravelly shoreline, full sun, with current. Origin: Introduced. Potamogeton crispus, P. richardsonii, Myriophyllum spicatum. Stipules green or Peter F. Zika 28005 whitish-green, leaf tips hooded; common submerged aquatic. Phenology: Flowers. Origin: 3 Jul 2016 Native. WTU-409821, WTU-V-023840 Peter F. Zika 27940 18 Jun 2016 Potamogetonaceae WTU-409820, WTU-V-023837 Potamogeton pusillus L. U.S.A., WASHINGTON, SAN JUAN COUNTY: Potamogetonaceae Near Rainshadow Road, east of False Bay Drive, San Juan Island. Potamogeton alpinus Balbis Elev. 10 m. 48.4806° N, 123.0607° W; Source: Specimen U.S.A., OREGON, DESCHUTES COUNTY: Label South shore of Todd Lake, at outlet, 4 air In 0.5-1.5 meters of water, full sun, with kilometers northwest of Tumalo Mountain. Potamogeton amplifolius, P. natans, Elev. 1870 m. Myriophyllum sibiricum, Typha angustifolia, 44.0254° N, 121.6844° W; Source: Specimen artificial pond in seasonally damp meadow. Label Common submerged aquatic. Origin: Native. In muck. In pools 0.5 meters deep, between drift logs, full sun, over dacite, with algae. Peter F. Zika 28170 Submerged rhizomatous aquatic, leaves mid-green to dark green when fresh, drying to 23 Jul 2016 red-brown. Origin: Native. WTU-410486, WTU-V-024597 Peter F. Zika 28049 8 Jul 2016 WTU-409819, WTU-V-023838 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton illinoensis Morong U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., WASHINGTON, CLALLAM COUNTY: Near boat launch at east end of Killebrew Lake, Center of south shore of Lake Sutherland, by 1.7 air kilometers south southwest of Diamond boat launch, Elwha River drainage, 7.2 air Hill, Orcas Island. kilometers north northeast of Lizard Head Peak, Elev. 90 m. Olympic Peninsula. 48.6049° N, 122.8984° W; Source: Specimen Elev. 160 m. Label 48.074° N, 123.711° W; Source: Specimen Near east shore, full sun, with Utricularia Label vulgaris, Ceratophyllum demersum, On shale pebble lake bottom, with Elodea, Myriophyllum sibiricum, Potamogeton Potamogeton zosteriformis, algae. Common praelongus. Submerged aquatic, common. submerged aquatic. Phenology: Fertile. Origin: Phenology: Flowers and Fruits. Origin: Native. Native. Peter F. Zika 28133 Peter F. Zika 27269 20 Jul 2016 27 Aug 2015 WTU-410487, WTU-V-024598 WTU-406719, WTU-V-18940

Potamogetonaceae Potamogetonaceae Potamogeton pusillus L. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, SAN JUAN COUNTY: U.S.A., OREGON, KLAMATH COUNTY: North end of pond on south side of West Valley Quiet bay of east shore of Boyle Reservoir on Road, 1.3 air kilometers south southwest of Klamath River, south side of Route 66 near Cady Mountain, San Juan Island. junction with Topsy Grade Road, 6.6 air Elev. 95 m. kilometers northeast of Hayden Mountain. 48.5492° N, 123.1267° W; Source: Specimen Elev. 1160 m. Label 42.135° N, 122.03° W; Source: Specimen Full sun, with Nuphar, Iris pseudacorus, Label Utricularia vulgaris, Spirodela, Lemna Drifted to gravelly shoreline, full sun, with turionifera, Ricciocarpus natans. Common Potamogeton crispus, P. praelongus, submerged aquatic in 1 meter of water. Myriophyllum spicatum. Common submerged Phenology: Fruits. Origin: Native. aquatic. Origin: Native. Peter F. Zika 28159 Peter F. Zika 27939 22 Jul 2016 18 Jun 2016 WTU-410496, WTU-V-024588 WTU-410480, WTU-V-024603

Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton illinoensis Morong U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: Center of south shore of Lake Sutherland, by Near picnic area, Cascade Lake, 2 air boat launch, Elwha River drainage, 7.2 air kilometers south-southwest of Mount kilometers north northeast of Lizard Head Peak, Constitution, Orcas Island. Olympic Peninsula. Elev. 105 m. Elev. 160 m. 48.657° N, 122.857° W; Source: Specimen 48.074° N, 123.711° W; Source: Specimen Label Label Near north shore, full sun, with Ceratophyllum On shale pebble lake bottom, with Elodea, demersum, Myriophyllum sibiricum, Potamogeton spp., algae. Occasional Potamogeton zosteriformis, P. amplifolius, submerged aquatic. Phenology: Fertile. Origin: Stuckenia pectinata. Submerged aquatic, Native. occasional. Phenology: Flowers. Origin: Native. Peter F. Zika 27270 Peter F. Zika 28134 27 Aug 2015 20 Jul 2016 WTU-406720, WTU-V-18938 WTU-410494, WTU-V-024589 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton foliosus Raf. U.S.A., OREGON, MALHEUR COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: Southeast bank of Snake River, 1.6 air Near boat launch at east end of Killebrew Lake, kilometers northeast of Darrows Islands. 1.7 air kilometers south southwest of Diamond Elev. 630 m. Hill, Orcas Island. 44.263° N, 117.128° W; Source: Specimen Elev. 90 m. Label 48.6049° N, 122.8984° W; Source: Specimen Shallow water, with Myriophyllum spicatum. Label Common submerged aquatic. Phenology: Near east shore, full sun, with Utricularia Vegetative. Origin: Native. vulgaris, Ceratophyllum demersum, Myriophyllum sibiricum, Potamogeton Peter F. Zika 27831 zosteriformis, P. praelongus. Submerged aquatic, common. Mixed collection 28137; A = 31 May 2016 Potamogeton foliosus Raf. with keeled fruit. Phenology: Fruits. Origin: Native. WTU-410493, WTU-V-024592 Peter F. Zika 28137A 20 Jul 2016 Potamogetonaceae WTU-410491, WTU-V-024596 Potamogeton crispus L. Potamogetonaceae U.S.A., OREGON, KLAMATH COUNTY: Quiet bay of east shore of Boyle Reservoir on Potamogeton richardsonii (A. Benn.) Rydb. Klamath River, south side of Route 66 near junction with Topsy Grade Road, 6.6 air U.S.A., WASHINGTON, WHATCOM COUNTY: kilometers northeast of Hayden Mountain. Northeast shore of Lake Whatcom, Northshore Elev. 1160 m. Drive near Silvern Lane. 42.135° N, 122.03° W; Source: Specimen Elev. 90 m. Label 48.7684° N, 122.4073° W; Source: Specimen Drifted to gravelly shoreline, full sun, with Label Potamogeton richardsonii, P. praelongus, On gravel bottom in 0.5-1 meter of water, full Myriophyllum spicatum. Leaf margins wavy, sun, with Elodea nuttallii, Najas canadensis, stem flat, occasional submerged aquatic. Myriophyllum spicatum. Submerged aquatic, Phenology: Vegetative. Origin: Native. uncommon. Phenology: Vegetative. Origin: Native. Peter F. Zika 27937 Peter F. Zika 28304 18 Jun 2016 17 Aug 2016 WTU-410489, WTU-V-024593 WTU-412505, WTU-V-026904 Potamogetonaceae Potamogeton natans L. Potamogetonaceae U.S.A., OREGON, JACKSON COUNTY: Potamogeton obtusifolius Mertens & W.D.J. Koch 4.9 air kilometers west of Pilot Rock. Elev. 1005 m. U.S.A., WASHINGTON, JEFFERSON 42.7704° N, 122.8705° W; Source: Specimen COUNTY: Label [locality and coordinates withheld; status in On partly shaded shoreline, with Lemna minuta, Washington: G5/S2 (Sensitive; WANHP)] Callitriche, Pseudotsuga, Carex subfusca. Good sized patches on shorelines, mostly Floating leaves truncate to slightly cordate, growing inside band of Nuphar. Phenology: submersed leaves stiff, linear; common aquatic. Fruits. Origin: Native. Phenology: Flowers and Fruits. Origin: Native. Jenifer Parsons s.n. Peter F. Zika 27921 1 Aug 2008 17 Jun 2016 WTU-415004, WTU-V-032749 WTU-410490, WTU-V-024594 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton epihydrus Raf. U.S.A., WASHINGTON, PEND OREILLE U.S.A., WASHINGTON, PIERCE COUNTY: COUNTY: Coyote Bridge, Training Area 6, Joint Base Colville National Forest, along the Pend Oreille Lewis-McChord, 0.4 air kilometers River about 19 miles south of Ione. From Ione east-southeast of Harden Hill. take County Road #9345 East across the river, Elev. 95 m. then continue south on County Road #9325 47.0025° N, 122.5785° W; Source: Specimen about 19 miles. Label Elev. 2090 ft. Full sun, in 0.5 meters water in small stream, T34N R44E S18 NW1/4 SE1/4; WGS 84, with Callitriche, Phalaris, Elodea canadensis, uncertainty: 27522 m., Source: GeoLocate, Ranunculus aquatilis. Floating-leaved aquatic; Georef'd by Crystal Shin locally common. Origin: Native. Plants grow in the river. Origin: Native. Peter F. Zika 28247 Kathy Ahlenslager 630 with Sarah Krock 25 Jul 2000 12 Aug 2016 WTU-410972, WTU-V-025307 WTU-412170, WTU-V-026618

Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton illinoensis Morong U.S.A., WASHINGTON, SPOKANE COUNTY: Spokane; Spokane River behind Spokane Falls U.S.A., WASHINGTON, STEVENS COUNTY: Community College. West shore of Pierre Lake, near boat ramp and 47.6759°, -117.451106°; WGS 84, campground, 2.8 air kilometers northwest of uncertainty: 1000 m., Source: Digital Map, Hungry Hill, east of Forest Service Road 4013. Georef'd by Dan Post Elev. 615 m. Growing with Salix exigua, Phalaris 48.9051° N, 118.1406° W; Source: Specimen arundinacea, and Carex vesicaria. Origin: Label Native. In 0.5 meter of water; sunny marsh, with Potamogeton natans, Phalaris arundinacea, Iris Kathy Ahlenslager 442 pseudacorus. Submerged aquatic, occasional. with Robert Bursik Phenology: Vegetative. Origin: Native. 23 Jun 1994 Peter F. Zika 28371 WTU-410969, WTU-V-025311 30 Aug 2016 WTU-412148, WTU-V-026637 Potamogetonaceae Potamogeton natans L. Potamogetonaceae U.S.A., WASHINGTON, PIERCE COUNTY: South shore of Baumen Lake, Training Area 4, Potamogeton gramineus L. Joint Base Lewis-McChord. Elev. 90 m. U.S.A., WASHINGTON, CHELAN COUNTY: 47.0386° N, 122.6393° W; Source: Specimen Near east shore of Wapato Point, north shore of Label Lake Chelan, 15 air kilometers east southeast of In 1 meter water, full sun, with Nuphar, Stormy Mountain. Utricularia vulgaris, Veronica scutellata. Elev. 335 m. Floating-leaved aquatic. Origin: Native. 47.8782° N, 120.1289° W; Source: Specimen Label Peter F. Zika 28242 Shallow water, full sun, with Ranunculus with Sarah Krock flammula, Potamogeton epihydrus, P. praelongus, Elodea canadensis. Submerged 12 Aug 2016 aquatic; occasional. Origin: Native. WTU-412169, WTU-V-026611 Peter F. Zika 28509B 1 Oct 2016 WTU-412789, WTU-V-028044 Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton natans L. U.S.A., WASHINGTON, CHELAN COUNTY: CANADA, BRITISH COLUMBIA: Near east shore of Wapato Point, north shore of South side of Route 4, 0.4 road kilometers west Lake Chelan, 15 air kilometers east southeast of of junction with Chatsworth Road, Nanaimo Stormy Mountain. Regional District, Vancouver Island. Elev. 340 m. Elev. 130 m. 47.8781° N, 120.1549° W; Source: Specimen 49.31° N, 124.5354° W; Source: Specimen Label Label In deep water, full sun, with Crassula aquatica, In 1 meter water, slough, full sun, with Ranunculus aquatilis, Potamogeton alpinus. Utricularia vulgaris, Phalaris, Spiraea douglasii. Floating-leaved aquatic; common in deep water. Floating-leaved aquatic, submerged leaves Phenology: Vegetative. Origin: Native. linear, common. Origin: Native. Peter F. Zika 28513 Peter F. Zika 28464 1 Oct 2016 18 Sep 2016 WTU-412795, WTU-V-028047 WTU-412216, WTU-V-026656

Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton alpinus Balbis CANADA, BRITISH COLUMBIA: U.S.A., WASHINGTON, CHELAN COUNTY: Southeast shore of Blackburn Lake, Northwest Near east shore of Wapato Point, north shore of of Fulford-Ganges Road, southern Gulf Islands. Lake Chelan, 15 air kilometers east southeast of Elev. 100 m. Stormy Mountain. 48.8208° N, 123.4832° W; Source: Specimen Elev. 340 m. Label 47.8781° N, 120.1549° W; Source: Specimen Shallow water, muddy bottom, full sun, with Label Potamogeton epihydrus, P. amplifolius, In deep water, full sun, with Crassula aquatica, Sparganium emersum. Submerged aquatic. Ranunculus aquatilis, Potamogeton nodosus. Origin: Native. Floating-leaved aquatic; occasional. Phenology: Vegetative. Origin: Native. Peter F. Zika 28449 Peter F. Zika 28518 17 Sep 2016 1 Oct 2016 WTU-412214, WTU-V-026661 WTU-412796, WTU-V-028048 Potamogetonaceae Potamogetonaceae Potamogeton praelongus Wulfen Potamogeton richardsonii (A. Benn.) Rydb. CANADA, BRITISH COLUMBIA: North end of Nancy Greene Lake, near boat CANADA, BRITISH COLUMBIA: launch, campground, and junction of Routes 3 S end of Pitt Lake, S side of Grant Narrows in and 3B, 21 air kilometers southwest of Pitt-Addington Marsh, just E of boat launch on Castlegar, Monashee Mountains, Kootenay NE end of Rennie Road, Metro Vancouver Land District. Regional District. Elev. 1265 m. Elev. 3 m. 49.2581° N, 117.94166° W; Source: 49.34952° N, 122.61495° W; Source: Specimen Label Specimen Label In 0.5-1 meter water, full sun, with Elodea Submerged aquatic, full sun, in 1 m water at canadensis, Myriophyllum sibiricum. Submerged margin of extensive marsh, fresh-water aquatic, stipules 2.5-11 centimeters; common. intertidal, with Callitriche heterophylla, Origin: Native. Myriophyllum hippuroides. Uncommon submerged aquatic. Phenology: Vegetative. Peter F. Zika 28365 Origin: Native. 30 Aug 2016 Peter F. Zika 28485B with Frank Lomer WTU-412206, WTU-V-026669 20 Sep 2016 WTU-412461, WTU-V-026933 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton foliosus Raf. CANADA, BRITISH COLUMBIA: U.S.A., WASHINGTON, WHATCOM COUNTY: Southeast shore of Mara Lake, North Okanagan Northeast shore of Lake Whatcom, Northshore Regional District. Drive near Silvern Lane. Elev. 335 m. Elev. 90 m. 50.7268° N, 119.0314° W; Source: Specimen 48.7684° N, 122.4073° W; Source: Specimen Label Label 0.5-1 meter water, mud and cobble shore, full In 0.5-1 meter of water, full sun, with Elodea sun, with Potamogeton gramineus, Stuckenia nuttallii, Potamogeton richardsonii, Myriophyllum pectinata, Equisetum fluviatile, Ranunculus spicatum. Submerged aquatic, keeled fruit, flammula. Submerged aquatic, common. Origin: occasional on gravel bottom. Origin: Native. Native. Peter F. Zika 28303 Peter F. Zika 28342 17 Aug 2016 27 Aug 2016 WTU-412488, WTU-V-026891 WTU-412198, WTU-V-026676

Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton gramineus L. U.S.A., WASHINGTON, WAHKIAKUM CANADA, BRITISH COLUMBIA: COUNTY: Southeast shore of Mara Lake, North Okanagan Below Steamboat Slough Road, by Price island, Regional District. near Skamokawa. Elev. 335 m Elev. 1 m. 50.7268° N, 119.0314° W; Source: Specimen 46.2595° N, 123.4398° W; Source: Specimen Label Label 0.01-1 meter water, mud and cobble shore, full Submerged aquatic; common, fresh-water sun, with Potamogeton richardsonii, Stuckenia intertidal mud shore, common in shallow water, pectinata, Equisetum fluviatile, Ranunculus full sun, with Potamogeton richardsonii, near flammula. Submerged or stranded aquatic, culvert. Submerged aquatic; common. Origin: common. Origin: Native. Native. Peter F. Zika 28341 Peter F. Zika 28291 27 Aug 2016 14 Aug 2016 WTU-412197, WTU-V-026677 WTU-412539, WTU-V-027119

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton praelongus Wulfen U.S.A., WASHINGTON, THURSTON COUNTY: U.S.A., WASHINGTON, SAN JUAN COUNTY: N shore of Fiander Lake, Training Area 19, Joint Near boat launch at east end of Killebrew Lake, Base Lewis-McChord. 1.7 air kilometers south southwest of Diamond Elev. 135 m. Hill, Orcas Island. 47.94993° N, 122.68953° W; Source: Elev. 90 m. Specimen Label, Invalid coordinates (located 48.6049° N, 122.8984° W; Source: Specimen outside county bounds). Label 1 m water over a muddy bottom, full sun, with Near north shore, full sun, near east shore, with Nuphar, Brasenia, Ceratophyllum demersum, Utricularia vulgaris, Ceratophyllum demersum, Myriophyllum verticillatum. Common Potamogeton foliosus, P. pusillus, P. floating-leaved aquatic. Phenology: Fertile. zosteriformis. Submerged aquatic, occasional. Origin: Native. Origin: Native. Peter F. Zika 28494 Peter F. Zika 28135 with Rod Gilbert, Peter W. Dunwiddie & Sarah Krock. 20 Jul 2016 23 Sep 2016 WTU-410521, WTU-V-024563 WTU-412477, WTU-V-026921 Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton illinoensis Morong U.S.A., WASHINGTON, CHELAN COUNTY: U.S.A., OREGON, SHERMAN COUNTY: Near E shore of Wapato Point, N shore of Lake Near boat ramp, LePage Park, west shore of Chelan, 15 air km ESE of Stormy Mountain. John Day River, backwater of Lake Umatilla Elev. 335 m. reservoir on Columbia River, south of Interstate 47.8782° N, 120.1289° W; Source: Specimen 84. Label Elev. 80 m. In shallow water, full sun, with Ranunculus 45.7286° N, 120.6511° W; Source: Specimen flammula, Potamogeton epihydrus, P. Label praelongus, Elodea canadensis. Submerged Shallow water, full sun, over basalt, with aquatic; occasional. Phenology: Vegetative. Heteranthera dubia, Myriophyllum spicatum, Origin: Native. Potamogeton crispus, P. foliosus. Uncommon submerged aquatic. Origin: Native. Peter F. Zika 28512 Peter F. Zika 29045 1 Oct 2016 19 Aug 2017 WTU-412881, WTU-V-028398 WTU-416489, WTU-V-035406

Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton crispus L. U.S.A., WASHINGTON, WAHKIAKUM COUNTY: U.S.A., OREGON, MULTNOMAH COUNTY: Below Steamboat Slough Road, by Price Island, Blue Lake. near Skamokawa. 45.5542° N, 122.4453° W; Source: Specimen Elev. 1 m. Label 46.2595° N, 123.4398° W; Source: Specimen In water column of lake. Nymphaea, Stuckenia Label pectinata, Myriophyllum spicatum, Elodea Fresh-water intertidal mud shore, common in canadensis. Flowering. Abundant. Phenology: shallow water, full sun, with Potamogeton Flowers. Origin: Introduced. foliosus, near culvert. Submerged aquatic white rhizome; common. Origin: Native. Dominic Maze 369 Peter F. Zika 28292 4 Jul 2016 14 Aug 2016 WTU-414274, WTU-V-031256 WTU-412545, WTU-V-027109 Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton crispus L. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WASHINGTON, CHELAN COUNTY: Palisades Park. West shore of Columbia River, near Cowan 47.666983°, -117.486534°; WGS 84, Avenue, 4.9 air kilometers east-northeast of uncertainty: 1000 m., Source: Digital Map, Peters Point, Entiat. Georef'd by Dan Post Elev. 215 m. Spring stream in basalt bed and associated 47.6669° N, 120.2185° W; Source: Specimen riparian vegetation, growing with Veronica Label anagallis-aquatica, Senecio foetidus and Ribes In shallow water, mud and gravel shoreline, full aureum. Phenology: Vegetative. Origin: Native. sun, with Potamogeton richardsonii, Myriophyllum spicatum. Submerged aquatic. Kathy Ahlenslager 422 Origin: Introduced. with Robert Bursik Peter F. Zika 28523 23 Jun 1994 1 Oct 2016 WTU-410957, WTU-V-025268 WTU-414051, WTU-V-029519 Potamogetonaceae Potamogetonaceae Potamogeton amplifolius Tuck. Potamogeton epihydrus Raf. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WASHINGTON, STEVENS COUNTY: Three Springs Natural Area on the Spokane Western Colville National Forest and Vicinity: River. Little Twin Lakes, ca [about] 11 air mi E of 47.723597°, -117.379875°; WGS 84, Colville. uncertainty: 30000 m., Source: Digital Map, Elev. 3700 ft. Georef'd by Dan Post T35N R41E S4 NW¼, also T36N R41E S33 Growing with Juncus acuminatus, Salix SW¼; WGS 84, uncertainty: 1000 m., Source: lasiandra and Rorippa nasturtium-aquatica Digital Map, Georef'd by Joseph Stormer Origin: Native. Lake shore. Phenology: Flowers. Origin: Native. Kathy Ahlenslager 418 Jean Wood 6676 with Robert Bursik 1 Aug 1996 23 Jun 1994 WTU-410961, WTU-V-025272 WTU-410956, WTU-V-025269

Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton crispus L. U.S.A., WASHINGTON, PEND OREILLE U.S.A., WASHINGTON, PEND OREILLE COUNTY: COUNTY: Colville National Forest, Newport Ranger Colville National Forest, Newport Ranger District. About 4 mi. S of Ione, take the Tiger District, Panhandle Campground about 17 mi. S Hwy (#20) about 7 mi. to Rd. 2712. Go S on it of Ione. From Ione take County Road #9345 E about 4 mi. to Rufus Meadows. Follow an old 1 mi. to County Rd. #9325. Follow it about 17 road and the section line post for NE 1/4 of mi. S to Panhandle Campground. Plants grow section 27 to the meadows. in the Pend Oreille River. Elev. 4100 ft. Elev. 2060 ft. T36N R42E S26; WGS 84, uncertainty: 1500 T35N R44E S29; WGS 84, uncertainty: 200 m., Source: Digital Map, Georef'd by Dan Post m., Source: Digital Map, Georef'd by Dan Post Scattererd on edge of meadows. Phenology: Phenology: Vegetative. Origin: Introduced. Flowers. Origin: Native. Kathy Ahlenslager 744 Kathy Ahlenslager 106 18 May 1993 13 Aug 1991 WTU-410960, WTU-V-025273 WTU-410955, WTU-V-025270 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton alpinus Balbis U.S.A., WASHINGTON, PEND OREILLE U.S.A., WASHINGTON, FERRY COUNTY: COUNTY: Western Colville National Forest and Vicinity: Colville National Forest, along the Pend Oreille headwaters of Barnaby Creek, ca [about] 6 air River about 19 mi. S of Ione. From Ione take mi SE of Sherman Pass along Forest Road County Rd. #9435 E across the river, then 2014. continue S on County Rd. #9325 about 19 mi. Elev. 4200 ft. Elev. 2090 ft. T35N R35E S15 SW¼; also S22 NW¼; WGS T34N R44E S18 NW¼ SE¼; WGS 84, 84, uncertainty: 2184 m., Source: Digital Map, uncertainty: 10000 m., Source: GeoLocate, Georef'd by Isaac Afolayan Georef'd by Crystal Shin Old beaver ponds on creek. Phenology: Plants grow in the river. Origin: Introduced. Flowers. Origin: Native. Kathy Ahlenslager 627 Jean Wood 6983 with Diane Pavek 25 Jul 2000 3 Aug 1996 WTU-410959, WTU-V-025274 WTU-410954, WTU-V-025271 Potamogetonaceae Potamogetonaceae Potamogeton pragrefillia Potamogeton natans L. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WASHINGTON, STEVENS COUNTY: Three Springs Natural Area on the Spokane Colville Ranger District. Beaver ponds in Wilson River. Creek. Ca. [about] 10 miles northeast of 47.723597°, -117.379875°; WGS 84, Chewelah on South Fork Chewelah Creek uncertainty: 30000 m., Source: Digital Map, Road. Georef'd by Dan Post T33N R41E S13 SE¼; WGS 84, uncertainty: Growing with Juncus acuminatus, Salix 2000 m., Source: Digital Map, Georef'd by lasiandra and Rorippa nasturtium-aquatica. Crystal Shin Phenology: Flowers. Origin: Native. Kathy Ahlenslager 440 with Robert Bursik Thomas Burke 847 with Cindy Talbott 23 Jun 1994 14 Jul 1983 WTU-410967, WTU-V-025312 WTU-410964, WTU-V-025327

Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton natans L. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WASHINGTON, STEVENS COUNTY: Spokane; Palisades Park. Colville. Beaver ponds in Wilson Creek. Ca. 47.666892°, -117.48597°; WGS 84, [about] 10 miles northeast of Chewelah on uncertainty: 1000 m., Source: Digital Map, South Fork Chewelah Creek Road. Georef'd by Dan Post T33N R41E S13 SE¼; WGS 84, uncertainty: Spring stream in basalt bed and associated 2000 m., Source: Digital Map, Georef'd by riparian vegetation, growing with Veronica Crystal Shin anagallis-aquatica, Senecio foetidus and Ribes Phenology: Flowers. Origin: Native. aureum. Phenology: Vegetative. Origin: Native. Thomas Burke 847 Kathy Ahlenslager 423 with Cindy Talbott 23 Jun 1994 14 Jul 1983 WTU-410968, WTU-V-025314 WTU-410963, WTU-V-025328

Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton natans L. U.S.A., WASHINGTON, STEVENS COUNTY: U.S.A., WASHINGTON, FERRY COUNTY: Western Colville National Forest and Vicinity: Western Colville National Forest and Vicinity: Little Twin Lakes, ca [about] 11 air mi E of Kettle Range: Trailhead and parking area to Hall Colville. Ponds, ca [about] 12 air mi SE of Republic; Elev. 3700 ft. Forest Road 600 from Hall Creek on west side T35N R41E S4 NW¼, also T36N R41E S33 of Sherman Pass. SW¼; WGS 84, uncertainty: 1000 m., Source: Elev. 4600 ft. Digital Map, Georef'd by Joseph Stormer T35N R34E S16 SE¼; WGS 84, uncertainty: Lake shore. Origin: Native. 1000 m., Source: Calc. from TRS, Georef'd by Sara Shiina Jean Wood 6675 Mixed forest of ponderosa pine to subalpine fir. Origin: Native. 1 Aug 1996 Jean Wood 3556 WTU-410962, WTU-V-025325 16 Aug 1995 WTU-410965, WTU-V-025329 Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton foliosus Raf. U.S.A., WASHINGTON, STEVENS COUNTY: U.S.A., WASHINGTON, KLICKITAT COUNTY: Waits Lake; peatland about 10 miles south of Near boat launch, Railroad Park, just north of Chewlah. John Day dam, Lake Umatilla reservoir on 48.183894°, -117.791948°; WGS 84, Columbia River. uncertainty: 1500 m., Source: Digital Map, Elev. 80 m. Georef'd by Dan Post 45.7255° N, 120.6977° W; Source: Specimen Growing with Salix bebbiana, Carex flava and Label Juncus acuminatus. Origin: Native. Full sun, shallow water near marshy shoreline, over basalt, with Elodea nuttallii, Potamogeton Kathy Ahlenslager 428 gramineus, P. crispus, Heteranthera dubia. with Robert Bursik Occasional submerged aquatic. USAC Columbia River Plant Survey. Origin: Native. 25 Jun 1994 Peter F. Zika 29030 WTU-410958-B, WTU-V-025330 18 Aug 2017 WTU-416689, WTU-V-036321 Potamogetonaceae Potamogeton gramineus L. Potamogetonaceae U.S.A., OREGON, MORROW COUNTY: Marshy margin of south shore of Lake Umatilla Potamogeton crispus L. reservoir on Columbia River, 8.5 air kilometers southwest of Crow Butte Island. U.S.A., OREGON, SHERMAN COUNTY: Elev. 80 m. Near boat ramp, LePage Park, west shore of 45.8135° N, 119.959° W; WGS 84, Source: John Day River, backwater of Lake Umatilla GPS reservoir on Columbia River, south of Interstate In dense beds of aquatics in shallow water, full 84. sun, over basalt, with Elodea nuttallii, Elev. 80 m. Potamogeton richardsonii, P. crispus, Stuckenia 45.7286° N, 120.6511° W; Source: Specimen pectinata, Zannichellia palustris, Heteranthera Label dubia. Occasional floating-leaved aquatic. In shallow water, full sun, over basalt, with USAC Columbia River Plant Survey. Origin: Heteranthera dubia, Myriophyllum spicatum, Native. Potamogeton illinoensis, P. foliosus. Occasional submerged aquatic. USAC Columbia River Peter F. Zika 29063 Plant Survey. Origin: Introduced. 19 Aug 2017 Peter F. Zika 29044 WTU-416505, WTU-V-035421 19 Aug 2017 Potamogetonaceae WTU-416678, WTU-V-036309 Potamogeton pusillus L. U.S.A., OREGON, MORROW COUNTY: Potamogetonaceae Marshy margin of south shore of Lake Umatilla reservoir on Columbia River, 8.5 air kilometers Potamogeton richardsonii (A. Benn.) Rydb. southwest of Crow Butte Island. Elev. 80 m. U.S.A., OREGON, MORROW COUNTY: 45.8135° N, 119.959° W; WGS 84, Source: Marshy margin of south shore of Lake Umatilla GPS reservoir on Columbia River, 8.5 air kilometers In dense beds of aquatics in shallow water, full southwest of Crow Butte Island. sun, over basalt, with Elodea nuttallii, Elev. 80 m. Potamogeton gramineus, P. richardsonii, 45.8135° N, 119.959° W; Source: Specimen Stuckenia pectinata, Heteranthera dubia. Label Submerged aquatic, common. USAC Columbia In dense bed of aquatics in 1 meter of water, full River Plant Survey. Origin: Native. sun, over basalt, with Elodea nuttallii, Potamogeton gramineus, P. crispus, Stuckenia Peter F. Zika 29054B pectinata, Zannichellia palustris, Heteranthera dubia. Common submerged aquatic. USAC 19 Aug 2017 Columbia River Plant Survey. Origin: Native. WTU-416502, WTU-V-035422 Peter F. Zika 29061 19 Aug 2017 WTU-416680, WTU-V-036311 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton alpinus Balbis U.S.A., OREGON, MORROW COUNTY: U.S.A., WASHINGTON, KLICKITAT COUNTY: Marshy margin of south shore of Lake Umatilla Near boat launch, Railroad Park, just north of reservoir on Columbia River, 8.5 air kilometers John Day dam, Lake Umatilla reservoir on southwest of Crow Butte Island. Columbia River. Elev. 80 m. Elev. 80 m. 45.8135° N, 119.959° W; Source: Specimen 45.7255° N, 120.6977° W; Source: Specimen Label Label In dense bed of aquatics in 1 meter of water, full Full sun, marshy shoreline, over basalt, with sun, over basalt, with Elodea nuttallii, Potamogeton foliosus, P. crispus, P. Potamogeton gramineus, P. richardsonii, gramineus, Myriophyllum spicatum. Aquatic, Stuckenia pectinata, Heteranthera dubia. submerged leaves to 12 centimeters long. Common submerged aquatic. USAC Columbia USAC Columbia River Plant Survey. Origin: River Plant Survey. Origin: Introduced. Native. Peter F. Zika 29058 Peter F. Zika 29035 19 Aug 2017 18 Aug 2017 WTU-416674, WTU-V-036305 WTU-416834, WTU-V-036463

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton foliosus Raf. U.S.A., OREGON, MULTNOMAH COUNTY: U.S.A., OREGON, SHERMAN COUNTY: Latourelle Prairie; western extent of prairie/fen Near boat ramp, LePage Park, west shore of system. John Day River, backwater of Lake Umatilla 45.5555° N, 122.0209° W; Source: Specimen reservoir on Columbia River, south of Interstate Label 84. Open, deep water greater than 1 meter. Elev. 80 m. Hypericum anagalloides, Carex aquatilis var. 45.7286° N, 120.6511° W; Source: Specimen dives. Flowers/Fruits. Common in larger Label waterbodies present. Phenology: Flowers and In shallow water, full sun, over basalt, with Fruits. Origin: Native. Heteranthera dubia, Myriophyllum spicatum, Potamogeton crispus, P. illinoensis. Common Dominic Maze 203 submerged aquatic. USAC Columbia River Plant Survey. Origin: Native. 27 Jul 2016 Peter F. Zika 29046 WTU-416925, WTU-V-036483 19 Aug 2017 WTU-416676, WTU-V-036307 Potamogetonaceae Potamogeton crispus L. Potamogetonaceae U.S.A., OREGON, MULTNOMAH COUNTY: Stormwater pond next to Portland International Potamogeton gramineus L. Raceway. Connected to Columbia Slough via side channels. U.S.A., OREGON, BENTON COUNTY: 45.5957° N, 122.7004° W; Source: Specimen Near causeway to Crow Butte Island, backwater Label of Lake Umatilla reservoir on north bank of Large, shallow, steep-banked stormwater pond. Columbia River. Stuckenia pectinata, Lemna minor, Elev. 80 m. Ceratophyllum, Spirodela. Vegetative. Abundant 45.8667° N, 119.828° W; Source: Specimen in deeper parts of pond (>1 meter). Phenology: Label, Invalid coordinates (located outside Vegetative. Origin: Introduced. county bounds). In shallow warm water, full sun, over basalt Dominic Maze CN 178 cobbles, with Schoenoplectus tabernaemontani, with Christa von Behren Heteranthera dubia, Elodea nuttallii, Stickenia pectinata. Occasional submerged aquatic. 2 Aug 2016 USAC Columbia River Plant Survey. Origin: Native. WTU-417337, WTU-V-037153 Peter F. Zika 29006 18 Aug 2017 WTU-416841, WTU-V-036466 Potamogetonaceae Potamogetonaceae Potamogeton diversifolius Raf. Potamogeton gramineus L. U.S.A., OREGON, JOSEPHINE COUNTY: U.S.A., WASHINGTON, KLICKITAT COUNTY: [locality and coordinates withheld; status in Railroad Island Park, 7.5 miles east of Maryshill Bridge. Oregon: S1 (Critically Imperiled; OBIC)] Elev. 268 ft. Elev. 1350 ft. 45.725069° N, 122.697985° W; WGS 84, Source: GPS, Georef'd In shallow water and partial shade, with by Sarah Winkowski, Invalid coordinates (located outside county Myriophyllum. Submerged aquatic plant with bounds). some floating leaves and flowers. Phenology: Locally common in shallow water along shoreline, forming dense Flowers. patches. Barbara L. Wilson 18605 Peter Dunwiddie PWD-17-586 4 Aug 2017 with Nick Otting with Peter Zika, Stacy Kinsell 22 Jul 2015 Herbarium: WTU WTU-412778A, WTU-V-038029 Potamogetonaceae Potamogeton pusillus L. Potamogetonaceae U.S.A., WASHINGTON, KLICKITAT COUNTY: Potamogeton crispus L. Railroad Island Park, 7.5 miles east of Maryshill Bridge. Elev. 268 ft. U.S.A., OREGON, MULTNOMAH COUNTY: 45.725069° N, 122.697985° W; WGS 84, Source: GPS, Georef'd Columbia River south shore. Beach upstream of by Sarah Winkowski, Invalid coordinates (located outside county James Gleason Boat Ramp. bounds). 45.5023° N, 122.5922° W; Source: Specimen Locally common in shallow water along shoreline, forming dense Label patches. Wrack at low tide. Phenology: Vegetative. Origin: Introduced. Peter Dunwiddie PWD-17-587 4 Aug 2017 with Peter Zika, Stacy Kinsell Dominic Maze 390 Herbarium: WTU 11 Sep 2016 WTU-417605, WTU-V-038086 Potamogetonaceae Potamogeton alpinus Balbis Potamogetonaceae U.S.A., WASHINGTON, BENTON COUNTY: Plymouth Park Boat Launch. Potamogeton alpinus Balbis Elev. 268 ft. 45.92931° N, 119.36501° W; WGS 84, Source: GPS, Georef'd by U.S.A., WASHINGTON, KITTITAS COUNTY: Sarah Winkowski NE shore of Lake Easton reservoir. Backwater in Columbia River, 0.5 meter deep water, with Elev. 665 m. Heteranthera dubia. 47.2531° N, 121.1959° W; Source: Specimen Label Peter Dunwiddie PWD-17-589 5 Aug 2017 Uncommon in shallow water near marsh edge, with Peter Zika, Stacy Kinsell full sun, with Eleocharis acicularis, Ranunculus aquatilis. Submerged aquatic. Origin: Native. Herbarium: WTU Peter F. Zika 28390 Potamogetonaceae 4 Sep 2016 Potamogeton foliosus Raf. WTU-412885, WTU-V-028393 U.S.A., OREGON, GILLIAM COUNTY: On Columbia River 2.7 miles east of Arlington. Elev. 268 ft. Potamogetonaceae 45.75188° N, 120.16967° W; WGS 84, Source: GPS, Georef'd by Sarah Winkowski Potamogeton foliosus Raf. Common in water <1 meter deep near shore. U.S.A., WASHINGTON, KLICKITAT COUNTY: Peter Dunwiddie PWD-17-596 3 Aug 2017 Railroad Island Park, 7.5 miles east of Maryshill Bridge. with Peter Zika, Stacy Kinsell Elev. 268 ft. 45.725069° N, 122.697985° W; WGS 84, Source: GPS, Georef'd Herbarium: WTU by Sarah Winkowski, Invalid coordinates (located outside county bounds). Locally common in shallow water along shoreline, forming dense patches. Peter Dunwiddie PWD-17-584 4 Aug 2017 with Peter Zika, Stacy Kinsell Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogeton epihydrus Raf. U.S.A., OREGON, GILLIAM COUNTY: U.S.A., WASHINGTON, JEFFERSON On Columbia River 2.7 miles east of Arlington. COUNTY: Elev. 268 ft. Leland Lake recreation area. Approximately 100 45.75188° N, 120.16967° W; WGS 84, Source: GPS, Georef'd by meters west to 100 meters east of boat ramp. Sarah Winkowski Elev. 66 m. Common in water less than 1 meter deep near shore. 47.89784° N, 122.87675° W; WGS 84, uncertainty: 100 m., Source: GPS Peter Dunwiddie PWD-17-597 3 Aug 2017 Lake shoreline and water to 1 meter deep; with Peter Zika, Stacy Kinsell shoreline dominated by Phalaris arundinacea and adjacent lake waters by Potamogeton sp. Herbarium: WTU and Elodea nuttallii. Apical leaves floating; locally common at boat ramp. Phenology: Flowers and Fruits. Origin: Native. Potamogetonaceae David Giblin 6335 Potamogeton foliosus Raf. 29 Aug 2018 U.S.A., WASHINGTON, KLICKITAT COUNTY: Railroad Island Park, 7.5 miles east of Maryshill Bridge. WTU-419982, WTU-V-043170 Elev. 268 ft. 45.725069° N, 122.697985° W; WGS 84, Source: GPS, Georef'd by Sarah Winkowski, Invalid coordinates (located outside county Potamogetonaceae bounds). A single plant growing on shoreline among Cyperus, Juncus, and Potamogeton pusillus L. grasses. U.S.A., WASHINGTON, CLALLAM COUNTY: Peter Dunwiddie PWD-17-585 4 Aug 2017 Olympic National Forest. Pond at junction of Forest Service Road 3116 and Highway 113. Herbarium: WTU Elev. 122 m. 48.10466° N, 124.25994° W; WGS 84, uncertainty: 100 m., Source: GPS Potamogetonaceae Impounded pond with Plalaris arundinacea and Nuphar polysepala emergent. Scattered in Potamogeton gramineus L. open water to 1 meter deep; submerged. Phenology: Vegetative. Origin: Native. CANADA, BRITISH COLUMBIA: Osoyoos Lake near United States of America David Giblin 6285 border. Elev. 279 m. 28 Aug 2018 UTM Zone 11U, 321549E, 5431909N; NAD 83, Source: Calc. from UTM, Georef'd by Dan WTU-419980, WTU-V-043168 Post Floating in lake. Origin: Native. Terry McIntosh 2009_89 Potamogetonaceae with K. Robbins, K. Safford Potamogeton praelongus Wulfen 14 Sep 2009 U.S.A., WASHINGTON, CLALLAM COUNTY: WTU-417910, WTU-V-040000 Olympic National Forest. Beaver lake. Elev. 182 48.1137° N, 124.24568° W; WGS 84, Potamogetonaceae uncertainty: 20 m., Source: GPS Riverside edge with Alnus rubra, Acer Potamogeton crispus L. circinatum, and Symphoricarpos albus common. Stem found floating on water surface; U.S.A., OREGON, GILLIAM COUNTY: detached. Phenology: Vegetative. Origin: On Columbia River 2.7 mi east of Arlington. Native. Elev. 268 45.75188° N, 120.16967° W; WGS 84, Source: GPS David Giblin 6274 Common in water <1m deep near shore. Origin: Introduced. 28 Aug 2018 Peter Dunwiddie PWD-17-598 3 Aug 2017 WTU-419986, WTU-V-043173 Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton robbinsii Oakes U.S.A., WASHINGTON, CLALLAM COUNTY: U.S.A., WASHINGTON, JEFFERSON Olympic National Forest. Pond at junction of COUNTY: Forest Service Road 3116 and Highway 113. Leland Lake Recreation area. Approximately Elev. 122 m. 100 meters west to 100 meters east of boat 48.10466° N, 124.25994° W; WGS 84, ramp. uncertainty: 100 m., Source: GPS Elev. 66 m. Impounded pond with Plalaris arundinacea and 47.89784° N, 122.87675° W; WGS 84, Nuphar polysephala emergent. Common and uncertainty: 100 m., Source: GPS abundant in open water to 1.5 meters deep. Lake shoreline and water to 1 meter deep; Phenology: Flowers and Fruits. Origin: Native. shoreline dominated by Phalaris arundinacea and adjacent lake waters by Potamogeton sp. David Giblin 6284 and Elodea nuttallii. All leaves submersed, brownish green; forming monoculture in water to 18 Oct 2018 1 meter deep. Phenology: Vegetative. Origin: Native. WTU-419960, WTU-V-043185 David Giblin 6336 29 Aug 2018 Potamogetonaceae WTU-420034, WTU-V-043888 Potamogeton praelongus Wulfen Potamogetonaceae U.S.A., WASHINGTON, JEFFERSON Potamogeton gramineus L. COUNTY: Leland Lake Recreation area. Approximately U.S.A., WASHINGTON, PIERCE COUNTY: 100 meters west to 100 meters east of boat JBLM, Artillary Impact Area, Mortar Point 3, Nisqually Lake vicinity. ramp. Elev. 82 m. Elev. 66 m. 47.02895° N, 122.62569° W; WGS 84, Source: GPS 47.89784° N, 122.87675° W; WGS 84, Occasional in shallow water. Foliage green, highly branched. Origin: uncertainty: 100 m., Source: GPS Native. Lake shoreline and water to 1 meter deep; shoreline dominated by Phalaris arundinacea Peter Dunwiddie PWD-16-257 24 Jun 2016 and adjacent lake waters by Potamogeton sp. with Rod Gilbert, Sarah Krock, Peter Zika and Elodea nuttallii. Leaves green, submersed; detached stems suspended below water Herbarium: WTU surface. Phenology: Vegetative. Origin: Native. David Giblin 6337 Potamogetonaceae 29 Aug 2018 Potamogeton pusillus L. WTU-420002, WTU-V-043887 U.S.A., WASHINGTON, PIERCE COUNTY: JBLM, TA-12, Chambers Lake. Potamogetonaceae Elev. 98 m. 47.01395° N, 122.53185° W; WGS 84, Source: GPS Potamogeton robbinsii Oakes Uncommon in deeper water. U.S.A., WASHINGTON, CLALLAM COUNTY: Peter W. Dunwiddie PWD 16-379 13 Jul 2016 Olympic National Forest. Beaver Lake, main with Peter Zika, Sarah Krock parking area with asphalt and gravel parking area. Herbarium: WTU Elev. 170 m. 48.11308° N, 124.24767° W; WGS 84, uncertainty: 30 m., Source: GPS Potamogetonaceae Edge of pond dominated by Iris pseudacorus, Spirea douglasii, and Salix sp. Carex obnupta Potamogeton amplifolius Tuck. and Nuphar polysepala emergent and dominant. Forming a near monoculture in water to 2 U.S.A., WASHINGTON, PIERCE COUNTY: meters deep. Phenology: Vegetative. Origin: JBLM, TA-12, Chambers Lake. Native. Elev. 98 m. 47.01395° N, 122.53185° W; WGS 84, Source: GPS David Giblin 6291 Common and widespread. 28 Aug 2018 Peter W. Dunwiddie PWD 16-383 13 Jul 2016 with Peter Zika, Sarah Krock WTU-419981, WTU-V-043167 Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, PIERCE COUNTY: U.S.A., WASHINGTON, SKAMANIA COUNTY: JBLM, TA-2, McKay Marsh. Greenleaf Lake on north side of Highway 14; Elev. 80 m. boat ramp area and shoreline approximately 47.10027° N, 122.61534° W; WGS 84, Source: GPS 100 meters to the west. Occasional with Hippuris vulgaris in 1 m deep water. Floating lvs Elev. 21 m. cordate-based, underwater lvs linear. 45.64738° N, 121.95698° W; WGS 84, uncertainty: 200 m., Source: GPS Peter Dunwiddie PWD-16-410 27 Jul 2016 Former oxbow now impounded by road; with Sarah Krock, Peter Zika, Amber Martens disturbed shoreline with Leersia oryzoides, Iris pseudacorus and Rubus bifrons. Uncommon at Herbarium: WTU edge of pond; floating leaves present. Phenology: Vegetative. Origin: Native. Potamogetonaceae David Giblin 6385 Potamogeton cf. foliosus Raf. 25 Oct 2018 U.S.A., WASHINGTON, PIERCE COUNTY: WTU-420194, WTU-V-044326 JBLM, TA-2, McKay Marsh. Elev. 69 m. 47.10049° N, 122.61389° W; WGS 84, Source: GPS Occasional in open wter, 1-1.5 m deep. Potamogetonaceae Peter Dunwiddie PWD-16-425 27 Jul 2016 Potamogeton foliosus Raf. with Sarah Krock, Peter Zika, Amber Martens U.S.A., WASHINGTON, SKAMANIA COUNTY: Herbarium: WTU Greenleaf Lake on north side of Highway 14; boat ramp area and shoreline approximately 100 meters to the west. Potamogetonaceae Elev. 21 m. 45.64738° N, 121.95698° W; WGS 84, Potamogeton amplifolius Tuck. uncertainty: 200 m., Source: GPS Former oxbow now impounded by road; U.S.A., WASHINGTON, CLARK COUNTY: disturbed shoreline with Leersia oryzoides, Iris Fallen Leaf Lake Park, Shoreline just west of pseudacorus and Rubus bifrons. Locally picnic area. common in shallow water. Phenology: Elev. 65 m. Vegetative. Origin: Native. 46.60018° N, 122.40859° W; WGS 84, uncertainty: 50 m., Source: GPS, Invalid David Giblin 6386 coordinates (located outside county bounds). Eutrophic pond with Impatiens capensis, Nuphar 25 Oct 2018 polysepala, and Juncus effusus common along shoreline. Detached and floating at edge of WTU-420193, WTU-V-044328 pond; floating leaves present. Phenology: Vegetative. Origin: Native. David Giblin 6345 Potamogetonaceae 11 Sep 2018 Potamogeton natans L. WTU-420155, WTU-V-044229 U.S.A., WASHINGTON, SKAMANIA COUNTY: Icehouse Lake and adjacent old beaver ponds on north end. North side of Highway 14 at intersection with Bridge of the Gods. Potamogetonaceae Elev. 49 m. 45.66138° N, 121.90633° W; WGS 84, Potamogeton nodosus Poir. uncertainty: 200 m., Source: GPS Eutrophic ponds with shoreline of main pond U.S.A., WASHINGTON, CLARK COUNTY: dominated by Iris pseudacorus, Typha latifolia, Columbia River Washougal Park with access to Leersia oryzoides and Juncus effusus; beaver river. ponds less disturbed with Bidens cernua Elev. 14 m. common along shoreline with Equisetum 45.57628° N, 122.35543° W; WGS 84, telmateia. Common and abundant in shallow uncertainty: 100 m., Source: GPS water on edge of beaver ponds. Phenology: Sandy and silty shoreline dominated by Vegetative. Origin: Native. Eleocharis sp. Strongly rhizomatous; forming large stand in shallow water of mudflat. David Giblin 6453 13 Sep 2018 Phenology: Vegetative. Origin: Native. WTU-420620, WTU-V-048434 David Giblin 6371 11 Sep 2018 WTU-420212, WTU-V-044309 Potamogetonaceae Potamogetonaceae Potamogeton zosteriformis Fernald Potamogeton gramineus L. U.S.A., WASHINGTON, SKAMANIA COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: North Bonneville. Bass Lake from parking area Leader Lake from west end up the south bank to about 0.5 kilometers along south side of lake. approximately 1 km. Elev. 23 m. Elev. 690 m. 45.65025° N, 121.95467° W; WGS 84, 48.36082° N, 119.6964° W; WGS 84, uncertainty: 500 m., Source: GPS uncertainty: 1000 m., Source: GPS Seasonally fluctuating pond with Fraxinus Seasonally fluctuating lake with silty drawdown latifolia along banks and Eleocharis sp. and area along edge; adjacent sandy upland; water's Phalaris arundinacea common along shoreline. edge dominated by Myriophyllum sp. Floating Leaves broadly linear; common and abundant in leaves absent; leaves broadly lanceolate; water to 1.5 meters deep. Phenology: scattered in shallow water. Phenology: Vegetative. Origin: Native. Vegetative. Origin: Native. David Giblin 6462 David Giblin 6523 13 Sep 2018 3 Oct 2018 WTU-420638, WTU-V-048419 WTU-423841, WTU-V-064843

Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton crispus L. U.S.A., WASHINGTON, SKAMANIA COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: North Bonneville. Bass Lake from parking area Green Lake. East side of lake at public access point. to about 0.5 kilometers along south side of lake. Elev. 469 m. Elev. 23 m. 48.45137° N, 119.62737° W; WGS 84, uncertainty: 30 m., 45.65025° N, 121.95467° W; WGS 84, Source: Digital map uncertainty: 500 m., Source: GPS Clear-watered montane lake with gravelly bottom. Utricularia vulgaris Seasonally fluctuating pond with Fraxinus and Chara sp. common. Locally common in shallow water; latifolia along banks and Eleocharis sp. and rhizomatous. Phenology: Vegetative. Origin: Introduced. Phalaris arundinacea common along shoreline. Leaves narrowly linear; scattered in water to 1 David Giblin 6553 4 Oct 2018 meter deep. Phenology: Vegetative. Origin: Native. Herbarium: WTU David Giblin 6463 Potamogetonaceae 13 Sep 2018 Potamogeton gramineus L. WTU-420639, WTU-V-048420 U.S.A., WASHINGTON, OKANOGAN COUNTY: Green Lake. East side of lake at public access point. Potamogetonaceae Elev. 469 m. 48.45137° N, 119.62737° W; WGS 84, uncertainty: 30 m., Potamogeton alpinus Balbis Source: Digital map Clear-watered montane lake with gravelly bottom. Utricularia vulgaris U.S.A., WASHINGTON, OKANOGAN COUNTY: and Chara sp. common. Leaves broadly lanceolate; scattered in Leader Lake from west end up the south bank shallow water. Phenology: Fruits. Origin: Native. approximately 1 km. Elev. 690 m. David Giblin 6555 4 Oct 2018 48.36082° N, 119.6964° W; WGS 84, uncertainty: 1000 m., Source: GPS Herbarium: WTU Seasonally fluctuating lake with silty drawdown area along edge; adjacent sandy upland; water's edge dominated by Myriophyllum sp. Floating leaves present; common in shallow water. Phenology: Vegetative. Origin: Native. David Giblin 6522 3 Oct 2018 WTU-423743, WTU-V-064474 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton epihydrus Raf. U.S.A., OREGON, CLATSOP COUNTY: U.S.A., WASHINGTON, MASON COUNTY: Julia Butler Hansen National Wildlife Refuge. Bog peatland approximately 1 kilometer south of Pillar Rock Island. Dewatto Bay Road. Elev. 1 m. Elev. 120 m. 46.2501° N, 123.5827° W; WGS 84, 47.4246° N, 123.03613° W; WGS 84, uncertainty: 100 m., Source: Digital map uncertainty: 200 m., Source: GPS Sandy island with mix of shrub-forest, dredge Mix of Kalmia microphylla/Rhododendron soil and freshwater intertidal zone; parts of groenlandicum/Sphagnum bog and more open intertidal zone dominated by Lythrum salicaria. peatland with muddy to deep water channels; Linear leaves; turning black; uncommon. Juncus acuminatus and Rhynchospora alba Phenology: Vegetative. Origin: Native. common. Common in open water and on mud flats. Phenology: Vegetative. Origin: Native. Cathy Maxwell 1673 with Kathleen Sayce, David Giblin. Jeff Walker 801 with Peter Zika, David Giblin 22 Sep 2010 24 Aug 2015 WTU-424754, WTU-V-067938 WTU-424932, WTU-V-068389

Potamogetonaceae Potamogetonaceae Potamogeton alpinus Balbis Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, PIERCE COUNTY: Okanogan-Wenatchee National Forest. Government Meadows. U.S.A., OREGON, CLATSOP COUNTY: Elev. 1456 m. Julia Butler Hansen National Wildlife Refuge. 47.089134° N, 121.393599° W; WGS 84, uncertainty: 500 m., Pillar Rock Island. Source: GPS Elev. 1 m. Large wet meadow complex dominated by Carex spp. and 46.2501° N, 123.5827° W; WGS 84, Calamagrostis sp. with Ligusticum, Comarum, and Erigeron. Locally uncertainty: 100 m., Source: Digital map common in shallow pond; rhizomatous. Phenology: Vegetative. Sandy island with mix of shrub forest, dredge Origin: Native. spoils, and freshwater intertidal zone; parts of intertidal zone dominated by Lythrum salicaria. David Giblin 4028 15 Sep 2011 Uncommon in low areas of intertidal zone. with Ben Legler, Valentin Yakubov Phenology: Vegetative. Origin: Native. Herbarium: WTU Cathy Maxwell 1674 with Kathleen Sayce, David Giblin Potamogetonaceae 23 Sep 2010 Potamogeton foliosus Raf. WTU-425360, WTU-V-069139 U.S.A., WASHINGTON, PIERCE COUNTY: Okanogan-Wenatchee National Forest. Government Meadows. Elev. 1456 m. Potamogetonaceae 47.089134° N, 121.393599° W; WGS 84, uncertainty: 500 m., Source: GPS Potamogeton praelongus Wulfen Large wet meadow complex dominated by Carex spp. and Calamagrostis sp. with Ligusticum, Comarum, and Erigeron. U.S.A., WASHINGTON, KITTITAS COUNTY: Common and abundant in shallow pond; forming dense mat. Northeast corner of I-90 interchange at south Phenology: Vegetative. Origin: Native. end of Cle Elum; pond formed from old borrow pit. David Giblin 4029 15 Sep 2011 Elev. 575 m. with Ben Legler, Valentin Yakubov 47.09904° N, 120.69727° W; WGS 84, uncertainty: 10 m., Source: GPS Herbarium: WTU Shallow water pond to 2 meters deep with Typha latifolia and Lemna turionifera along edge and Nuphar polysepala along surface of open water; also adjacent dry upland. Leaves broad; completely submerged; uncommon. Phenology: Vegetative. Origin: Native. Don Knoke 2336A with David Giblin 24 Sep 2012 WTU-425328, WTU-V-069423 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton crispus L. U.S.A., WASHINGTON, YAKIMA COUNTY: U.S.A., OREGON, WASCO COUNTY: Okanogan-Wenatchee National Forest. Along Deschutes River Recreation Area, Heritage Landing. Highway 410, 0.25 road mile southeast of Elev. 175 ft. junction with Little River Road. 45.633326° N, 120.914858° W; WGS 84, Source: GPS Elev. 766 m. In shallow flowing water, with Myriophyllum quitense, Potamogeton 46.98472° N, 121.09157° W; WGS 84, crispus, Elodea canadensis. Rhizomatous, leaf margins wavey. uncertainty: 7 m., Source: GPS Origin: Introduced. Oxbow cut off from river by road with standing water; muddy shoreline dominated by Carex Peter F. Zika PWD-19-322 30 Jul 2019 and Juncus. Locally common in water to 1 m with Peter Dunwiddie deep; surface leaves lacking. Phenology: Vegetative. Origin: Native. Herbarium: WTU Alex Harkness 12-132 with David Giblin, Ben Legler Potamogetonaceae 29 Aug 2012 Potamogeton illinoensis Morong WTU-425322, WTU-V-069417 U.S.A., OREGON, SHERMAN COUNTY: Southwest side of John Day River, at the Narrows, 10 miles above confluence with Columbia River. 45.662876° N, 120.508122° W; WGS 84, Source: GPS Potamogetonaceae Several plants in a stagnant 3-4' deep pool (in channel during highwater events), with Elodea canadensis and Potamogeton Potamogeton natans L. pusillus. Phenology: Flowers. Origin: Native. U.S.A., WASHINGTON, YAKIMA COUNTY: Peter F. Zika PWD-19-351 30 Jul 2019 Okanogan-Wenatchee National Forest. with Peter Dunwiddie Approximately 8 km south of dam along Forest Service Road on south side of lake. Herbarium: WTU Elev. 1140 m. 46.83565° N, 121.33909° W; WGS 84, uncertainty: 7 m., Source: GPS Potamogetonaceae Wet meadow with seasonally fluctuating water level; Carex vesicaria and Dulichium Potamogeton richardsonii (A. Benn.) Rydb. arundinacea dominant. Common throughout meadow in standing water and where water has U.S.A., WASHINGTON, KLICKITAT COUNTY: receded; floating leaves present. Phenology: Near Plymouth Park boatlaunch. Vegetative. Origin: Native. 45.9287933° N, 119.3689231° W; Source: Google Earth, Invalid coordinates (located outside county bounds). Ben Legler 12515 Frequent in calm water with muddy substrate in 1-2m depth, with with Alex Harkness, David Giblin Potamogeton crispus, Stuckenia pectinata, Ceratophyllum demersum. Undulate leaf margins, clasping at base. Phenology: 29 Aug 2012 Flowers and Fruits. Origin: Native. WTU-425321, WTU-V-069198 Peter F. Zika PWD-19-422 3 Aug 2019 with Peter Dunwiddie Herbarium: WTU Potamogetonaceae Potamogeton richardsonii (A. Benn.) Rydb. Potamogetonaceae U.S.A., WASHINGTON, BENTON COUNTY: Potamogeton illinoensis Morong Mouth of Glade Creek on Columbia River. 45.89119° N, 119.69152° W; WGS 84, Source: GPS, Georef'd by U.S.A., WASHINGTON, BENTON COUNTY: Crystal Shin On Columbia River north shore, Plymouth Park near I-82 bridge. Common submerged aquatic, with Elodaea nuttallii, Potamogeton 45.93404° N, 119.33437° W; WGS 84, Source: GPS crispus, Myriophyllum spicatum, Heteranthera dubia. 1m deep water, muddy bottom, with Potamogeton crispus, Potamogeton foliosus, Zannichellia palustris, Stuckenia pectinata. Peter Dunwiddie PWD-18-389 12 Jul 2018 Floating leaves present, submerged leaves 11 veined, sessile, with Peter Zika narrowly elliptic. Stipules 2.5cm. Phenology: Flowers. Origin: Native. Herbarium: WTU Peter F. Zika PWD-19-425 4 Aug 2019 with Peter Dunwiddie Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, BENTON COUNTY: U.S.A., WASHINGTON, WALLA WALLA COUNTY: On Columbia River north shore, Plymouth Park near I-82 bridge. McNary National Wildlife Refuge, Peninsula Unit. 45.93404° N, 119.33437° W; WGS 84, Source: GPS 46.17731° N, 118.99353° W; WGS 84, Source: GPS Common in 1m deep water, muddy bottom, with Potamogeton Slough off the main channel of Columbia River, 1-1.5m deep. crispus, Zannichellia palustris, Stuckenia pectinata. Fruits keeled. Common and widespread. Phenology: Flowers and Fruits. Origin: Phenology: Fruits. Origin: Native. Native. Peter F. Zika PWD-19-426 4 Aug 2019 Peter F. Zika PWD-19-519 9 Aug 2019 with Peter Dunwiddie with Peter Dunwiddie Herbarium: WTU Herbarium: WTU

Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton illinoensis Morong U.S.A., WASHINGTON, BENTON COUNTY: U.S.A., WASHINGTON, WALLA WALLA COUNTY: On Columbia River north shore, Plymouth Park near I-82 bridge. McNary National Wildlife Refuge, Peninsula Unit. 45.93404° N, 119.33437° W; WGS 84, Source: GPS 46.17731° N, 118.99353° W; WGS 84, Source: GPS Common in 1m deep water, muddy bottom, with Potamogeton Slough off the main channel of Columbia River, 1-1.5m deep. crispus, Zannichellia palustris, Stuckenia pectinata. Fruits not Occasional. Origin: Native. crested. Phenology: Fruits. Origin: Native. Peter F. Zika PWD-19-520 9 Aug 2019 Peter F. Zika PWD-19-427 4 Aug 2019 with Peter Dunwiddie with Peter Dunwiddie Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton nodosus Poir. Potamogeton crispus L. U.S.A., WASHINGTON, WALLA WALLA COUNTY: U.S.A., WASHINGTON, BENTON COUNTY: McNary National Wildlife Refuge, Peninsula Unit. On Columbia River north shore, Plymouth Park near I-82 bridge. 46.17731° N, 118.99353° W; WGS 84, Source: GPS 45.93404° N, 119.33437° W; WGS 84, Source: GPS Slough off the main channel of Columbia River, 1-1.5m deep. Common in 1m deep water, muddy bottom, with Potamogeton Uncommon in shallow muddy water. Phenology: Fruits. Origin: crispus, Zannichellia palustris, Stuckenia pectinata. Leaf margins Native. wavy. Phenology: Fruits. Origin: Introduced. Peter F. Zika PWD-19-521 9 Aug 2019 Peter F. Zika PWD-19-428 4 Aug 2019 with Peter Dunwiddie with Peter Dunwiddie Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton berchtoldii Fieber Potamogeton gramineus L. U.S.A., WASHINGTON, WALLA WALLA COUNTY: McNary National Wildlife Refuge, Peninsula Unit. U.S.A., WASHINGTON, WALLA WALLA COUNTY: 46.15384° N, 118.95766° W; WGS 84, Source: GPS McNary National Wildlife Refuge, Peninsula Unit. Slough off the main channel of Columbia River, 1-1.5m deep. 46.18404° N, 119.00562° W; WGS 84, Source: GPS Common and widespread. Phenology: Fruits. Origin: Native. Common in 1-2m water, with Elodea nuttallii, Potamogeton crispus. Origin: Native. Peter F. Zika PWD-19-523 9 Aug 2019 with Peter Dunwiddie Peter F. Zika PWD-19-512 9 Aug 2019 with Peter Dunwiddie Herbarium: WTU Herbarium: WTU

Potamogetonaceae Potamogeton crispus L. U.S.A., WASHINGTON, WALLA WALLA COUNTY: McNary National Wildlife Refuge, Peninsula Unit. 46.18404° N, 119.00562° W; WGS 84, Source: GPS Common in 1-2m water, with Potamogeton gramineus, Heteranthera dubia, and Elodea nuttallii. Phenology: Flowers. Origin: Introduced. Peter F. Zika PWD-19-513 9 Aug 2019 with Peter Dunwiddie Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton strictifolius A. Benn. U.S.A., WASHINGTON, PIERCE COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: SE margin of McKay Marsh, W of Flora Road, Bonaparte Lake. Joint Base Lewis-McChord. 38N-30E-17; WGS 84, uncertainty: 1099 m., Elev. 65 ft. Source: GeoLocate, Georef'd by Crystal Shin 47.10049° N, 122.61389° W Growing submersed with other pondweeds In open water 1-1.5 m deep, with Myriophyllum (Potamogeton richardsonii, P. natans), Najas verticillatum, Juncus bulbosus, Sparganium flexilis, and Chara sp. emersum. Submerged aquatic, occasional. J. Parsons s.n. Peter W. Dunwiddie 16-425 with K. Nowlin with Peter. F. Zika, Sarah Krock, Amber Martens 23 Aug 2017 27 Jul 2016 WTU-422100, WTU-V-057346 WTU-412158, WTU-V-026628 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton natans L. U.S.A., WASHINGTON, KING COUNTY: U.S.A., WASHINGTON, COWLITZ COUNTY: Tukwila. Green River, approximately 0.3 km north of Three Friends Solo Slough. Collected on south side of culvert Fishing Hole Park parking lot on east side of river. going under Hwy 432 near Willow Grove Rd. Elev. 5 m. 46.1645° N, 123.0308° W 47.425° N, 122.2669° W; WGS 84, uncertainty: 20 m., Source: Growing with Egeria densa, Cabomba Digital map, Georef'd by David Giblin caroliniana, Ceratophyllum demersum. Disturbed shoreline area with embankment dominated by Phalrais arundinacea and Rubus bifrons. Locally common in shallow water of J. Parsons s.n. river backchannel; rhizomatous. Phenology: Vegetative. Origin: with K. Nowlin Introduced. 28 Jun 2017 David Giblin 7827 1 Sep 2020 WTU-422098, WTU-V-057343 Herbarium: WTU

Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton natans L. U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: U.S.A., WASHINGTON, COWLITZ COUNTY: Olympic National Forest. Lake Quinault. Falls Creek Campground Solo Slough. Collected on south side of culvert shoreline. going under Hwy 432 near Willow Grove Rd. Elev. 125 m. 08N-03W-14; uncertainty: 1200 m., Georef'd 47.4697° N, 123.8476° W; WGS 84, uncertainty: 50 m., Source: by Joseph Stormer Digital map Growing with Egeria dense, Cabomba Cobbly shoreline area with occasional sandy/silty areas both in the caroliniana, Ceratophyllum demersum. water and along the shoreline. Locally common in silty soil in water to 40 cm deep; rhizomatous; leaves submerged. Phenology: J. Parsons s.n. Vegetative. Origin: Native. with K. Nowlin David Giblin 7166 28 Aug 2019 28 Jun 2017 Herbarium: WTU WTU-422097, WTU-V-057344 Potamogetonaceae Potamogetonaceae Potamogeton illinoensis Morong Potamogeton strictifolius A. Benn. U.S.A., WASHINGTON, OKANOGAN COUNTY: Whitestone Lake. Approximately 5 km west of Ellisforde. Public U.S.A., WASHINGTON, OKANOGAN COUNTY: fishing access area. Bonaparte Lake. Elev. 382 m. 38N-30E-17; WGS 84, uncertainty: 1099 m., 48.79167° N, 119.46949° W; WGS 84, uncertainty: 20 m., Source: GeoLocate, Georef'd by Crystal Shin Source: GPS Growing submersed with other pondweeds Water to 1 meter deep with Chara sp. common along bottom; soil (Potamogeton richardsonii, P. natans), Najas silty. Locally common and abundant; inflorescences erect, above flexilis, and Chara sp. water line. Phenology: Fruits. Origin: Native. J. Parsons s.n. David Giblin 7352 19 Sep 2019 with K. Nowlin Herbarium: WTU 23 Aug 2017 WTU-422099, WTU-V-057345 Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton gramineus L. U.S.A., WASHINGTON, OKANOGAN COUNTY: U.S.A., WASHINGTON, CLARK COUNTY: Sinlahekin Wildlife Area. Blue Lake. Approximately in middle of lake Columbia River shore at Steamboat Landing along eastern shore. Park; 0.4km south of downtown Washougal Elev. 516 m. Elev. 4 m. 48.68202° N, 119.68784° W; WGS 84, uncertainty: 100 m. 45° N, 122° W; Misleading coordinates given Seasonally fluctuating lake with Populus trichocarpa, Salix exigua, only to nearest degree. and Phalaris arundinacea along shoreline. Leaves linear, Recently exposed mudflat Myriophyllum submersed; scattered in shallow water. Phenology: Vegetative. spicatum, Elodea canadensis, Stuckenia Origin: Native. R.E. Brainerd 2902 David Giblin 7373 20 Sep 2019 3 Sep 2018 Herbarium: WTU WTU-424450, WTU-V-067136 Potamogetonaceae Potamogeton illinoensis Morong Potamogetonaceae U.S.A., WASHINGTON, OKANOGAN COUNTY: Sinlahekin Wildlife Area. Blue Lake. Approximately in middle of lake Potamogeton crispus L. along eastern shore. Elev. 516 m. U.S.A., WASHINGTON, OKANOGAN COUNTY: 48.68202° N, 119.68784° W; WGS 84, uncertainty: 100 m. Green Lake. East side of lake at public access Seasonally fluctuating lake with Populus trichocarpa, Salix exigua, point. and Phalaris arundinacea along shoreline. Leaves floating and Elev. 469 m. submersed; common and abundant throughout area. Phenology: 48.45137° N, 119.62737° W; WGS 84, Flowers and Fruits. Origin: Native. uncertainty: 30 m., Source: Digital map Clear-watered montane lake with gravelly David Giblin 7374 20 Sep 2019 bottom. Utricularia vulgaris and Chara sp. common. Locally common in shallow water. Herbarium: WTU Rhizomatous. David Giblin 6553 Potamogetonaceae 4 Oct 2018 Potamogeton natans L. WTU-424905, WTU-V-068357 U.S.A., WASHINGTON, OKANOGAN COUNTY: Similkameen-Chopaka Wildlife Unit. Oxbow pond and surrounding area accessible from parking area. Potamogetonaceae Elev. 351 m. 48.95817° N, 119.7147° W; WGS 84, uncertainty: 200 m., Potamogeton gramineus L. Source: GPS Eutrophic, seasonally fluctuating pond with muck soil substrate and U.S.A., WASHINGTON, OKANOGAN COUNTY: adjacent disturbed upland with Bassia scoparia common and Green Lake. East side of lake at public access abundant. Leaves floating; common and abundant in shallow water; point. rhizomatous. Phenology: Vegetative. Origin: Native. Elev. 469 m. 48.45137° N, 119.62737° W; WGS 84, David Giblin 7315 18 Sep 2019 uncertainty: 30 m., Source: Digital map Clear-watered montane lake with gravelly Herbarium: WTU bottom. Utricularia vulgaris and Chara sp. common. Scattered in shallow water. Leaves broadly lanceolate. Potamogetonaceae David Giblin 6555 Potamogeton strictifolius A. Benn. 4 Oct 2018 U.S.A., MONTANA, FLATHEAD COUNTY: Just south of public boat ramp on NW shore of WTU-424904, WTU-V-068356 Little Bitterroot Lake, with Potamogeton richardsonii, P. natans, P. gramineus, Myriophyllum sibiricum, Persicaria amphibia, and Sagittaria spp. Elev. 1191 m. 48.1355° N, 114.7362° W In shallow alkaline water (0.1-0.2 m, pH 8.35), rooted in mud. Scott L. Freeman T67F 26 Aug 2020 WTU-424504, WTU-V-067369 Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton crispus L. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WASHINGTON, SPOKANE COUNTY: Hog Lake from south end to approximately 200 m up the west bank. Hog Lake from south end to approximately 200 m up the west bank. Elev. 609 m. Elev. 609 m. 47.37545° N, 117.80695° W; WGS 84, uncertainty: 200 m., 47.37545° N, 117.80695° W; WGS 84`, uncertainty: 200 m., Source: GPS Source: GPS Highly eutrophic basalt rimrock lake impounded at south end film of Highly eutrophic basalt rimrock lake; impounded at south end; film of green algae covering the surface; adjacent east-facing, disturbed green algae covering the surface; adjacent east-facing, disturbed Pinus ponderosa forest with Toxicodendron radicens common. Pinus ponderosa forest with Toxicodendron radicens common. Locally common in shallow water; rhizomatous. Phenology: Locally common in shallow water; rhizomatous. Phenology: Vegetative. Origin: Introduced. Vegetative. Origin: Introduced. David Giblin 7937 10 Sep 2020 David Giblin 7937 10 Sep 2020 Herbarium: WTU Herbarium: WTU

Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton gramineus L. U.S.A., WASHINGTON, WHITMAN COUNTY: U.S.A., WASHINGTON, SPOKANE COUNTY: South end of Rock Lake at WDFW public fishing access area. Long Lake, McClellan Conservation area on south side of lake. Elev. 526 m. Elev. 475 m. 47.13904° N, 117.72578° W; WGS 84, uncertainty: 50 m., 47.88176° N, 117.68932° W; WGS 84`, uncertainty: 100 m., Source: GPS Source: GPS Warm shallow, apparently eutrophic with Phalaris arundinacea Shallow water to 0.5 m deep and adjacent shoreline; Nymphoides dominant along shoreline; aquatic plant diversity low; adjacent peltata forming a monoculture on water surface; shoreline dominated disturbed sagebrush upland. Locally common in water to 40 cm by Iris pseudacorus. Floating leaves present; submersed leaves deep. Phenology: Vegetative. Origin: Introduced. rather broad, margins crisped; common. Phenology: Flowers. Origin: Native. David Giblin 7918 10 Sep 2020 David Giblin 7870 9 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton zosteriformis Fernald U.S.A., WASHINGTON, STEVENS COUNTY: Red Lake on north side of Highway 291, west end of lake. U.S.A., WASHINGTON, SPOKANE COUNTY: Elev. 560 m. Riverside State Park Boat Launch on Spokane River. 47.87576° N, 117.71024° W; WGS 84, uncertainty: 30 m., Elev. 478 m. Source: GPS 47.78893° N, 117.53181° W; WGS 84`, uncertainty: 200 m., 5-hectare lake with no outlet; bottom mucky and water depth Source: GPS increases quickly from shoreline; Lemna turionifera and Elodea Shallow water along shoreline and adjacent riparian zone and canadensis abundant near shoreline. Locally common; floating upland; riparian zone with Prunus virginiana and Crataegus sp. leaves broad, submersed leaves narrow; in water over 1 m deep. common; upland dominated by several invasive species. Abundant Phenology: Vegetative. Origin: Native. in water to 1.5 m deep; leaves linear. Phenology: Fruits. Origin: Native. David Giblin 7903 9 Sep 2020 David Giblin 7857 8 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, SPOKANE COUNTY: U.S.A., WASHINGTON, SPOKANE COUNTY: Riverside State Park Boat Launch on Spokane River. Long Lake, McClellan Conservation area on south side of lake. Elev. 478 m. Elev. 475 m. 47.78893° N, 117.53181° W; WGS 84`, uncertainty: 200 m., 47.88176° N, 117.68932° W; WGS 84`, uncertainty: 100 m., Source: GPS Source: GPS Shallow water along shoreline and adjacent riparian zone and Shallow water to 0.5 m deep and adjacent shoreline; Nymphoides upland; riparian zone with Prunus virginiana and Crataegus sp. peltata forming a monoculture on water surface; shoreline dominated common; upland dominated by several invasive species. Locally by Iris pseudacorus. Phenology: Vegetative. Origin: Native. common in water to 2 m deep; leaf margins strongly crisped. Phenology: Vegetative. Origin: Introduced. David Giblin 7876 9 Sep 2020 David Giblin 7858 8 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton robbinsii Oakes Potamogeton illinoensis Morong U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: U.S.A., WASHINGTON, WHITMAN COUNTY: Black River. Washington Department of Fish and Wildlife boat Amber Lake. Northcentral side of lake at WDFW boat launch area. launch area on south side of U.S. Highway 12. Elev. 653 m. 46.82982°, -123.18567°; WGS 84, uncertainty: 20 m., Source: 47.34816° N, 117.71471° W; WGS 84, uncertainty: 20 m., Digital map, Georef'd by David Giblin, Inverted longitude. Source: GPS, Invalid coordinates (located outside county bounds). Shallow water along edge of river with cobbly bottom. Phenology: Steep-banked basalt rimrock lake largely devoid of aquatic or Vegetative. Origin: Native. emerged vegetation; Schoenoplectus acutus, Persicaria amphibia and Myriophyllum spicatum the dominant species. Uncommon in David Giblin 3647 7 Oct 2010 water to 0.8 m deep; leaves submersed, rather broad. Phenology: Vegetative. Origin: Native. Herbarium: WTU David Giblin 7916 10 Sep 2020 Potamogetonaceae Herbarium: WTU Potamogeton zosteriformis Fernald Potamogetonaceae U.S.A., WASHINGTON, SPOKANE COUNTY: Hog Lake from south end to approximately 200 m up the west bank. Potamogeton zosteriformis Fernald Elev. 609 m. 47.37545° N, 117.80695° W; WGS 84, uncertainty: 200 m., U.S.A., WASHINGTON, WHITMAN COUNTY: Source: GPS Williams Lake. Northeast end at WDFW boat launch. Highly eutrophic basalt rimrock lake impounded at south end; film of Elev. 624 m. green algae covering the surface; adjacent east-facing, disturbed 47.33302° N, 117.6773° W; WGS 84, uncertainty: 50 m., Source: Pinus ponderosa forest with Toxicodendron radicans common. GPS, Invalid coordinates (located outside county bounds). Stems winged; uncommon in water to 30 cm deep. Phenology: Water to 1 meter deep and adjacent shoreline; Shoenoplectus Vegetative. Origin: Native. acutus dominant emergent species. Stems strongly flattened, locally common in water to 60 cm deep. Phenology: Vegetative. Origin: David Giblin 7931 10 Sep 2020 Native. Herbarium: WTU David Giblin 7910 10 Sep 2020 Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton praelongus Wulfen U.S.A., WASHINGTON, WHITMAN COUNTY: South end of Rock Lake at WDFW public fishing access area. U.S.A., WASHINGTON, WHITMAN COUNTY: Elev. 526 m. Williams Lake. Northeast end at WDFW boat launch. 47.13904° N, 117.72578° W; WGS 84, uncertainty: 50 m., Elev. 624 m. Source: GPS 47.33302° N, 117.6773° W; WGS 84, uncertainty: 50 m., Source: Warm shallow, apparently eutrophic water with Phalaris arundinacea GPS, Invalid coordinates (located outside county bounds). dominated along shoreline; aquatic plant diveristy low; adjacent Water to 1 meter deep and adjacent shoreline; Shoenoplectus disturbed sagebrush upland. Locally common in water to 40 cm acutus dominant emergent species. Scattered in water to 40 cm deep; floating leaves absent. Phenology: Vegetative. Origin: Native. deep; leaves broad, wavy. Phenology: Vegetative. Origin: Native. David Giblin 7919 10 Sep 2020 David Giblin 7909 10 Sep 2020 Herbarium: WTU Herbarium: WTU

Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton foliosus Raf. U.S.A., WASHINGTON, WHITMAN COUNTY: U.S.A., WASHINGTON, STEVENS COUNTY: Williams Lake. Northeast end at WDFW boat launch. Red Lake on north side of Highway 291, west end of lake. Elev. 624 m. Elev. 560 m. 47.33302° N, 117.6773° W; WGS 84, uncertainty: 50 m., Source: 47.87576° N, 117.71024° W; WGS 84, uncertainty: 30 m., GPS, Invalid coordinates (located outside county bounds). Source: GPS Water to 1 meter deep and adjacent shoreline; Shoenoplectus 5-hectare lake with no outlet; bottom mucky and water depth acutus dominant emergent species. Scattered in shallow water increases quickly from shoreline; Lemna turionifera and Elodea among Schoenoplectus acutus stand. Phenology: Vegetative. Origin: canadensis abundant near shoreline. Scattered in water to 1 m Native. deep. Phenology: Vegetative. Origin: Native. David Giblin 7914 10 Sep 2020 David Giblin 7904 9 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton richardsonii (A. Benn.) Rydb. U.S.A., WASHINGTON, KITSAP COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: East side of Gold Creek Road approximately 300 m north of Gold Enloe Dam Road along north bank of Simikameen River. Creek Trailhead parking area. Approximately 5 kms west of Oroville. Elev. 200 m. Elev. 361 m. 47.5528° N, 122.82738° W; WGS 84, uncertainty: 100 m., 48.96486° N, 119.49934° W; WGS 84, uncertainty: 500 m., Source: GPS Source: GPS Impounded wetland with extensive beaver activity (beaver seen) Shrub-steppe habitat above and rocky shoreline along river with dominated by Juncus supiniformis (forming extensive mats), Carex small sandy beaches. Artemisia tridentata common on slope and obnupta, and Phalaris arundinacea. Scattered in deeper water; Toxicodendron rydbergii common along river. Locally common and floating leaves present. Phenology: Vegetative. Origin: Native. abundant in shallow water; leaves submerged. Phenology: Vegetative. Origin: Native. David Giblin 7975 22 Sep 2020 David Giblin 7278 17 Sep 2019 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton foliosus Raf. Potamogeton amplifolius Tuck. U.S.A., WASHINGTON, KITSAP COUNTY: East side of Gold Creek Road approximately 300 m north of Gold U.S.A., WASHINGTON, KITSAP COUNTY: Creek Trailhead parking area. Nick's Lagoon approximately 1 air km northwest of Seabeck. Elev. 200 m. Elev. 24 m. 47.5528° N, 122.82738° W; WGS 84, uncertainty: 100 m., 47.63701° N, 122.0396° W; WGS 84, uncertainty: 100 m., Source: GPS Source: GPS, Invalid coordinates (located outside county bounds). Impounded wetland with extensive beaver activity (beaver seen) Complex of beaver ponds above tidal salt marsh in Alnus rubra dominated by Juncus supiniformis (forming extensive mats), Carex forest with Juncus effusus, Impatiens capensis, and Oenanthe obnupta, and Phalaris arundinacea. Locally common in shallow sarmentosa common. Abundant near shore of pond in water to 1 water and arising from mucky soil; floating leaves absent. meter deep; floating leaves broadly elliptic. Phenology: Vegetative. Phenology: Vegetative. Origin: Native. Origin: Native. David Giblin 7976 22 Sep 2020 David Giblin 8022 29 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton natans L. U.S.A., WASHINGTON, KITSAP COUNTY: U.S.A., WASHINGTON, KITSAP COUNTY: Nick's Lagoon approximately 1 air km northwest of Seabeck. Lake Tahuyeh Road, approximately 0.5 km north of junction with Elev. 24 m. Gold Creek Road; west side of road. 47.63701° N, 122.0396° W; WGS 84, uncertainty: 100 m., Elev. 180 m. Source: GPS, Invalid coordinates (located outside county bounds). 47.58043° N, 122.83506° W; WGS 84, uncertainty: 50 m., Complex of beaver ponds above tidal salt marsh in Alnus rubra Source: Digital map forest with Juncus effusus, Impatiens capensis, and Oenanthe Impounded wetland of shallow water and deep, mucky soil; Spiraea sarmentosa common. Scattered near shore of pond in water to 1 douglasii dominant along margin; open water dominated by Veronica meter deep; floating leaves broadly elliptic. Phenology: Vegetative. scutellata and Potamogeton sp. Floating leaves present and forming Origin: Native. near monoculture in some areas. Phenology: Fertile. Origin: Native. David Giblin 8023 29 Sep 2020 David Giblin 7981 22 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton gramineus L. Potamogeton alpinus Balbis U.S.A., WASHINGTON, KITSAP COUNTY: Hintzville Beaver Ponds. U.S.A., WASHINGTON, OKANOGAN COUNTY: Elev. 150 m. Enloe Dam Road along north bank of Simikameen River. 47.54987° N, 122.89889° W; WGS 84, uncertainty: 100 m., Approximately 5 kms west of Oroville. Source: Digital map Elev. 361 m. Large complex of old beaver ponds forming large open water areas 48.96486° N, 119.49934° W; WGS 84, uncertainty: 500 m., with mucky, soft bottom soil; periphery of ponds dominated by Source: GPS Juncus balticus ssp. ater and Dulichium arundinaceum; very little Shrub-steppe habitat above and rocky shoreline along river with subsurface aquatic vegetation; water clear. Locally common in open small sandy beaches. Artemisia tridentata common on slope and water to 1 meter deep; floating leaves narrowly elliptic. Phenology: Toxicodendron rydbergii common along river. Floating leaves Fruits. Origin: Native. present; stems long; locally common in shallow water; fruit about 3 mm long. Phenology: Fruits. Origin: Native. David Giblin 8014 29 Sep 2020 David Giblin 7281 17 Sep 2019 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton natans L. Potamogeton alpinus Balbis U.S.A., WASHINGTON, KITSAP COUNTY: U.S.A., WASHINGTON, OKANOGAN COUNTY: Nellita Road approximately 0.5 km west of Seabeck-Holly Highway Okanogan River approximately 2 kms south of Oroville. Public where Stavis Creek crosses roadway. fishing access area adjacent to Highway 97 bridge over river. Elev. 158 m. Elev. 220 m. 47.65619° N, 122.78377° W; WGS 84, uncertainty: 20 m., 48.10262° N, 119.70874° W; WGS 84, uncertainty: 20 m., Source: GPS Source: GPS Impounded clear-water pond dominated by Brasenia schreberi and Shallow water of river and adjacent bank. Scattered in shallow Utricularia vulgaris ssp. macrorhiza. Locally common in open water water; leaves submerged. Phenology: Vegetative. Origin: Native. to over 1 meter deep; floating leaves broadly elliptic. Phenology: Vegetative. Origin: Native. David Giblin 7247 17 Sep 2019 David Giblin 8020 29 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogetonaceae Potamogeton crispus L. Potamogeton foliosus Raf. U.S.A., WASHINGTON, OKANOGAN COUNTY: Okanogan River approximately 2 kms south of Oroville. Public U.S.A., WASHINGTON, KITSAP COUNTY: fishing access area adjacent to Highway 97 bridge over river. Nick's Lagoon approximately 1 air km northwest of Seabeck. Elev. 220 m. Elev. 24 m. 48.10262° N, 119.70874° W; WGS 84, uncertainty: 20 m., 47.63701° N, 122.0396° W; WGS 84, uncertainty: 100 m., Source: GPS Source: GPS, Invalid coordinates (located outside county bounds). Shallow water of river and adjacent bank. Scattered in shallow Complex of beaver ponds above tidal salt marsh in Alnus rubra water; leaves submerged. Phenology: Vegetative. Origin: forest with Juncus effusus, Impatiens capensis, and Oenanthe Introduced. sarmentosa common. Scattered in water to 0.5 meters deep; floating leaves absent. Phenology: Vegetative. Origin: Native. David Giblin 7247A 17 Sep 2019 David Giblin 8024 29 Sep 2020 Herbarium: WTU Herbarium: WTU Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae U.S.A., WASHINGTON, OKANOGAN COUNTY: Potamogeton zosteriformis Fernald Similkameen River at Shankers Bend, north side of river. Approximately 10 kms west of Oroville. U.S.A., WASHINGTON, GRAYS HARBOR COUNTY: Elev. 330 m. Olympic National Forest. Lake Quinault. Falls Creek Campground 48.98427° N, 119.50918° W; WGS 84, uncertainty: 50 m. shoreline. Mucky and sandy beach with Xanthium strumarium, Equisetum Elev. 125 m. arvense and Salix exigua common; area heavily grazed by cattle. 47.4697° N, 123.8476° W; WGS 84, uncertainty: 50 m., Source: Leaves submersed, narrowly linear; scattered in shallow water. Digital map Phenology: Fruits. Origin: Native. Cobbly shoreline area with occasional sandy/silty areas both in the water and along the shoreline. Locally common in silty soil in water David Giblin 7282 18 Sep 2019 to 40 cm deep; rhizomatous; leaves submerged. Herbarium: WTU David Giblin 7167 28 Aug 2019 Herbarium: WTU Potamogetonaceae Potamogeton foliosus Raf. Potamogetonaceae U.S.A., WASHINGTON, OKANOGAN COUNTY: Potamogeton epihydrus Raf. Similkameen-Chopaka Wildlife Unit. Oxbow pond and surrounding area accessible from parking area. U.S.A., WASHINGTON, OKANOGAN COUNTY: Elev. 351 m. Cassimer Bar Public Access Area. East bank of Okanogan River on 48.95817° N, 119.7147° W; WGS 84, uncertainty: 200 m., south side of Highway 97 bridge. Source: GPS Elev. 236 m. Eutrophic, seasonally fluctuating pond with muck soil substrate and 48.10263° N, 119.70873° W; WGS 84, uncertainty: 50 m., adjacent disturbed upland with Bassia scoparia common and Source: GPS abundant. Leaves narrow, submersed; uncommon in shallow water. Mucky and cobbly shoreline with Limosella and Elodea canadensis Phenology: Vegetative. Origin: Native. common and adjacent disturbed upland with Medicago sativa and Ulmus pumila common. Locally common in mucky soil; leaves David Giblin 7317 18 Sep 2019 floating if water present. Phenology: Vegetative. Origin: Native. Herbarium: WTU David Giblin 7238 17 Sep 2019 Herbarium: WTU