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Prepared for: The Great Lakes Network Inventory and Monitoring Program

Prepared by: Allan Harris Robert Foster

November 2003

Potential Flora of Voyageurs National Park ______

Abstract In 2003 we conducted surveys for vascular plant species in Voyageurs National Park. Twenty new plant species were discovered for the park and the status for two others was revised.

We estimate that 72% to 81% of the “potential flora” (plant species known to occur in the park plus those expected to occur) is known from the park. This is a slight increase from the 71% – 79% previous estimated.

Georeferenced locations of new and significant species are provided, as is a revised checklist of the vascular plants of Voyageurs National Park.

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Introduction Harris and Foster (2003) estimated the “potential flora” (plant species known to occur in the park plus those expected to occur) of Voyageurs National Park at 934 to 1045 species, of which 740 were satisfactory reported from the park.

The National Park Service’s goal is to verify >90% of all plants expected to occur in the park area. In 2003, the Great Lakes Network Inventory and Monitoring Program funded fieldwork to increase the proportion of known species.

Methods We checked fens, cliffs, prairie-like openings, shorelines and roadsides for plant species expected to occur in Voyageurs National Park based on Harris and Foster (2003). Fieldwork was completed June 23 – 25, July 22 – 24 and August 13 – 15 2003. A map of sampling locations is shown in Figure 1.

Voucher specimens of most species were collected for the Voyageurs National Park herbarium.

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## Figure 1. Map showing 2003 fieldwork locations.

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Figure 2. Calopogon tuberosa discovered in 2003 in fen at Tom Cod Bay.

Figure 3. Cliff habitat at Brown Bay.

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Results and Discussion

New Plants for Voyageurs National Park The following is an annotated list of plant species new for Voyageurs National Park. Table 1 summarizes changes in status of the plant species. Locations are provided in Appendix 1.

Meadow Foxtail Alopecurus pratensis This exotic grass was collected in a roadside ditch near the Rainy Lake Visitors Centre.

Tuberous Grasspink Calopogon tuberosus A single individual of this orchid was discovered in the treed fen at the west end of Tom Cod Bay (Figure 2). It is relatively widespread in Minnesota, but apparently confined to rich fen habitats (Ownbey and Morley 1991).

Northern Bog Sedge Carex gynocrates Northern bog sedge was discovered in the fen at the west end of Tom Cod Bay. It is known from other peatlands in northern Minnesota (Wright et al. 1992).

Woolly Sedge Carex pellita Woolly sedge was discovered at a beach on north side of Saginaw Bay, Rainy Lake and on the south side of Sullivan Bay, Namakan Lake. It is widespread and relatively common in Minnesota (Ownbey and Morley 1991) and adjacent Ontario. This species is sometimes known as Carex lanuginosa.

Showy Ticktrefoil Desmodium canadense A population of about 40 non-flowering plants of showy ticktrefoil was discovered on a shoreline at the southeast side of island at mouth of Dove Bay. This is a prairie species apparently not previously reported from Koochiching or St. Louis counties (Ownbey and Morley 1991), but known from the Rainy River in Ontario.

Elliptic Spikerush Eleocharis elliptica Elliptic spikerush was discovered in the fen at the west end of Tom Cod Bay. It is widespread in peatlands in nearby Ontario, but apparently uncommon in northern Minnesota (Ownbey and Morley 1991).

White Bedstraw Galium mollugo White bedstraw was collected on a roadside near the Rainy Lake Visitors Centre. This native to Europe is a recent addition to the flora of Minnnesota. It was first collected in St. Louis County in 2000 (Cholewa 2002).

Orange Hawkweed Hieracium aurantiacum This weed is common on roadsides near Kabetogama Visitor Centre and elsewhere in the park.

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Grassleaf Mudplantain Heteranthera dubia This submergent plant was discovered at Dove Bay where it is abundant. Grassleaf mudplantain is easily confused with pondweed species and probably more widespread on Rainy Lake.

Inland Rush Juncus interior Inland rush was discovered at four locations on Rainy Lake and two on Sandpoint Lake. This species is easily confused with J. dudleyii. It is widely distributed in Minnesota, including the Lake of the Woods to Rainy Lake area (Ownbey and Morley 1991).

Black Medick Medicago lupulina This exotic clover is apparently well established on roadsides in the park. It was collected on a roadside near Rainy Lake Visitors Centre.

Farwell's Watermilfoil Myriophyllum farwellii This submergent plant was discovered in Nett Lake. It is widespread, but uncommon in northern Minnesota and adjacent Ontario (Ownbey and Morley 1991).

Yellow Pond Lily Nuphar rubrodisca This species was collected at Deep Slu, Namakan Lake in 2002. Nuphar rubrodisca is sometimes considered a subspecies of the common Nuphar variegatum, but recognized as a full species by FNA (1997).

Pellitory Parietaria pensylvanica Pellitory was discovered on a southwest facing cliff on the north side of Grassy Bay, Sandpoint Lake. Although not mapped in northern Minnesota in Ownbey and Morley (1991), it is known from nearby locations in Ontario.

Snakemouth Orchid Pogonia ophioglossoides A small population of this orchid was discovered at the fen at the west end of Tom Cod Bay. It is relatively widespread in northern Minnesota, but apparently confined to rich fen habitats (Ownbey and Morley 1991).

Sulphur Cinquefoil Potentilla recta This exotic species was discovered on a roadside near Rainy Lake Visitors Centre.

Celeryleaf Buttercup Ranunculus sceleratus This species was discovered on a muddy shore on the north side of Black Bay. Its preferred habitat, exposed shoreline, was abundant in 2003 due to low water levels on Rainy Lake.

Northern Dwarf Raspberry Rubus acaulis Northern dwarf raspberry is relatively common in the fen and black spruce swamp at the west end of Tom Cod Bay. It is widespread in northern Minnesota and adjacent Ontario (Ownbey and Morley 1991).

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Lesser Spikemoss Selaginella densa Lesser spikemoss was discovered on a dry rock outcrop at Makinon Point, on the south side of Dryweed Island, Rainy Lake. This apparently represents the first record of this species for Minnesota (Cholewa 2002). Identification needs to be confirmed.

Clustered Burreed Sparganium glomeratum Clustered burreed was discovered in a black ash swamp along the snowmobile trail at the west end of Tom Cod Bay. This record apparently represents a northwest extension of its Minnesota range (Coffin and Pfannmuller 1988). Clustered bureed is on the Minnesota Special Concern list (DNR 2003).

Table 1. New vascular plant species (and changes in status) for Voyageurs National Park. Refer to Table 2 for status codes. Species Former New Notes Status Status Carex gynocrates 2 1 Collection 2003 Carex pellita 2 1 Collection 2003. Synonymous with Carex lanuginosa Calopogon tuberosus 2 1 Sight record 2003 Pogonia ophioglossoides 2 1 Collection 2003 Alopecurus pratensis 3 1 Collection 2003 Juncus interior 2 1 Collection 2003 Hieracium aurantiacum 3 1 Collection 2003 Sparganium glomeratum 8 1 Collection 2003 Selaginella densa - 1 Collection 2003. Identification needs to be verified. Ranunculus sceleratus - 1 Collection 2003 Potentilla recta 3 1 Collection 2003 Rubus acaulis 2 1 Collection 2003 Parietaria pensylvanica 8 1 Collection 2003 Dalea purpurea Vent. var purpurea 6 2 Collection 2003 - just outside park boundary Medicago lupulina 3 1 Collection 2003 Desmodium canadense - 1 Collection 2003 Eleocharis elliptica 2 1 Collection 2003 Heteranthera dubia 2 1 Collection 2003 Myriophyllum farwellii 2 1 Collection 2003 Galium mollugo - 1 Collection 2003 Nuphar rubrodisca 5 1 Collection 2002. Treated as full species in FNA (1997). Carex angustior 1 5 Synonymous with Carex echinata ssp echinata

Other Species Violet Prairie Clover (Dalea purpurea; also known as Petalostemon purpurea) was discovered in a roadside ditch at the turnoff to Rainy Lake Visitors Centre, 200 m outside the park boundary.

Locations for Vasey's pondweed (Potamogeton vaseyi) (Special Concern, DNR 2003), American shore plantain (Littorella uniflora var. americana) (Special Concern, DNR 2003), and pigmyweed (Crassula aquatica)(Threatened, DNR 2003) are provided in Appendix 1. These species were previously known from the park.

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Also of interest, a Threatened (DNR 2003) tiger beetle species (Cicindela denikei) was seen on a rocky shoreline at Junction Bay, Namakan Lake. It is relatively common in adjacent Ontario (Harris et al. 2002), but is endemic to the area west of Lake Superior (Coffin and Pfannmuller 1988).

Potential Flora A revised estimate of the “potential flora” (plant species known to occur in the park plus those expected to occur) is shown in Table 3. Each species was coded by its probability of occurring in Voyageurs National Park (Table 2).

Table 2. Plant status codes (Harris and Foster 2003). 1 Satisfactorily reported for VOYA; 2 Native species reported from surrounding area with a strong probability of occurring in VOYA; 3 Exotic reported from surrounding area – potentially present or with a reasonable probability of invading the park; 4 Exotic reported from surrounding area, but non-invasive (localized garden escapes, etc.); 5 Reported for VOYA, but taxonomic difficulties (including hybrids and subspecies); 6 Reported for VOYA, but record is dubious; 7 Occurs in adjacent area, but habitat is limited in VOYA; and 8 Occurs as an outlier or at the periphery of its range in the area with small chance of occurring in VOYA.

Table 3. Potential flora of Voyageurs National Park. Previous numbers reported in Harris and Foster (2003) are in parentheses. Code Status # Species 1 Satisfactorily reported 758 (740) 2 Surrounding native 161 (168) 3 Invasive exotic 22 (26) 4 Non-invasive exotic 22 (22) 5 Taxonomic difficulties 72 (69) 6 Dubious record 8 (9) 7 Limited habitat 0 (0) 8 Outlier 87 (89)

A total of 758 vascular plant species is satisfactorily documented from Voyageurs National Park (Table 3). A conservative estimate of the potential flora for Voyageurs National Park is 941 species (Code 1 + Code 2 + Code 3 species). A more liberal estimate, which also includes the non-invasive exotic species and outlier species, is 1050

______Northern Bioscience Page 8 October 2003 Potential Flora of Voyageurs National Park ______species (Code 1 + Code 2 + Code 3 + Code 4 + Code 8 species). According to these estimates, 72% to 81% of the potential flora is known from the park. This is a slight increase from the 71% – 79% estimated by Harris and Foster (2003).

A revised species list for Voyageurs National Park is presented in Appendix 2.

Recommendations

1. Further effort is needed to seach the peatland at Tom Cod Bay for rich fen species. A number of these species are known from nearby fens in Minnesota and Ontario including Carex exilis, Carex vaginata, Cladium mariscoides, Drosera anglica, Drosera intermedia, Drosera linearis, Eriophorum (Trichophorum) alpinum, Juncus stygius ssp americanus, Lycopodium selago, Rhynchospora alba, Rhyncospora fusca, Tofieldia glutinosa, Trichophorum caespitosum, and Xyris montana. Suitable habitat is present in the peatland, particularly at the western boundary of the park. 2. Continue inventory for submergents, shoreline species, and prairie species. 3. Standardize vascular plant nomenclature using the USDA PLANTS Database (USDA, NRCS. 2002) or other widely accepted standard. This will bring the Voyageurs plant list up to date and facilitate comparisons with other parks.

Literature Cited

Cholewa, A.F. 2003. Annotated Checklist of the Flora of Minnesota. http://www.cbs.umn.edu/herbarium/checklis2.htm. University of Minnesota Herbarium. Accessed October 15 2003.

Coffin, B. and L. Pfannmuller. 1988. Minnesota’s Endangered Flora and Fauna. Univ. of Minnesota Press. Minneapolis.

Flora of North America Editorial Committee (editors) (FNA). 1997. Flora of North America. Volume 3. Magnoliophyta: Magnoliidae and Hamamelidae. Oxford University Press, New York. 590 pp. Gleason, H.A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Edition. New York Botanical Garden. Harris, A.G. and R.F. Foster. 2003. Potential flora of Voyageurs National Park. Unpublished report. Prepared for Voyageurs National Park and The Great Lakes Network Inventory and Monitoring Program.

Harris, A.G., R.F. Foster, M.J. Oldham, and W.D. Bakowsky. 2002. Life science inventory of Rainy Lake, Ontario. Unpublished report. Prepared for the Rainy Lake Conservancy.

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Minnesota Department of Natural Resources (DNR). 2003. http://www.dnr.state.mn.us/ets/index.html Natural Heritage and Nongame Research Program Division of Ecological Services Minnesota Department of Natural Resources. Accessed October 15 2003.

Ownbey, G.B. and T. Morley. 1991. Vascular Plants of Minnesota. University of Minnesota Press. Minneapolis.

USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA. Accessed October 15 2003.

Wright, H.E., B.A. Coffin, and N.E. Aaseng (eds). 1992. Patterned Peatlands of Minnesota. University of Minnesota Press.

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Appendix 1. Locations for new and significant plant species in Voyageurs National Park.

UTM UTM Species UTM Northing Location Notes Zone Easting Roadside near Rainy Lake Alopecurus pratensis 15 485902.2408 5382230.866 Visitors Centre Fen at west end of Tom Cod Calopogon tuberosus 15 489930.1072 5370414.336 Single plant Bay Fen at west end of Tom Cod Carex gynocrates 15 490108.2341 5370461.51 Locally common Bay Beach on north side of Carex pellita 15 503054.8129 5380919.088 Sight record Saginaw Bay, Rainy Lake South side of Sullivan Bay, Carex pellita 15 511580.1429 5363240.708 Common Namakan Lake Crassula aquatica* 15 491733.70 5382752.50 Dove Bay, Rainy Lake North side of Grassy Bay, Crassula aquatica* 15 533956.6744 5360535.942 Sight record Sandpoint Lake Roadside ditch at turnoff to Outside park, 200 m north of Dalea purpurea 15 502062.6586 5380683.074 Rainy Lake Visitors Centre boundary Southeast side of island at Desmodium canadense 15 493313.6502 5383265.35 40+ plants on shoreline mouth of Dove Bay Fen at west end of Tom Cod Eleocharis elliptica 15 489535.2934 5372539.733 Bay Roadside near Rainy Lake Galium mollugo 15 485902.2408 5382230.866 Visitors Centre Weedy roadside near Hieracium aurantiacum 15 497773.0885 5365704.017 Common Kabetogama Visitor Centre Common in 50 to 150 cm of Heteranthera dubia 15 491733.70 5382752.50 Dove Bay, Rainy Lake water Small island north of Juncus interior 15 498141.1249 5384738.909 Steamboat Island, Rainy Rock outcrop. Sight record. Lake North shore of Saginaw Bay, South facing bedrock shore. Juncus interior 15 502062.6586 5380683.074 Rainy Lake Sight record Juncus interior 15 533956.6744 5360535.942 North side of Grassy Bay, Sight record

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UTM UTM Species UTM Northing Location Notes Zone Easting Sandpoint Lake North side of Grassy Bay, Juncus interior 15 534046.6751 5360567.48 Sight record Sandpoint Lake Makinon Point, south side of Juncus interior 15 489906.9614 5384137.657 50 culms in cracks in bedrock Dryweed Island Juncus interior 15 495825.6322 5383298.472 South side of Soldier Point, Abundant on exposed moist Littorella uniflora var. americana** 15 507409.7772 5382031.308 Rainy Lake sand Beach on north side of Littorella uniflora var. americana** 15 503054.8129 5380919.088 Saginaw Bay, Rainy Lake Bay on north side of Saginaw Littorella uniflora var. americana** 15 504284.9346 5381586.853 Bay, Rainy Lake South side of Soldier Point, Littorella uniflora var. americana** 15 507678.3564 5382148.458 Rainy Lake Roadside near Rainy Lake Medicago lupulina 15 485902.2408 5382230.866 Visitors Centre Myriophyllum farwellii 15 524697.4907 5361025.988 Nett Lake Nuphar rubrodisca 15 527728.0000 5364090.000 Deep Slu, Namakan Lake Cliff on north side of Grassy Parietaria pensylvanica 15 534126.926 5360223.891 Southwest facing granite cliff Bay, Sandpoint Lake Fen at west end of Tom Cod Pogonia ophioglossoides 15 488663.5298 5372451.664 Flower not yet open Bay Potamogeton vaseyi** East side of Brown Bay, 15 534260.2213 5358034.429 Sight record Sandpoint Lake Roadside near Rainy Lake Potentilla recta 15 485902.2408 5382230.866 Visitors Centre North shore of Black Bay, Peaty shoreline exposed by low Ranunculus scleratus 15 491690.4771 5378611.215 Rainy Lake water level Fen at west end of Tom Cod Rubus acaulis 15 489648.6407 5370676.521 Common Bay Fen at west end of Tom Cod Rubus acaulis 15 489535.2934 5372539.733 Common Bay Selaginella densa 15 489906.9614 5384137.657 Makinon Point, south side of

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UTM UTM Species UTM Northing Location Notes Zone Easting Dryweed Island, Rainy Lake Black ash swamp on trail along Sparganium glomeratum 15 490017.8275 5372901.03 West end of Tom Cod Bay uplands Cicindela denikei (tiger beetle) * Exit to Junction Bay, Namkan 15 512518.7429 5363956.74 Dry rocky shoreline Lake * Threatened, DNR 2003

** Special Concern, DNR 2003

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Appendix 2. Revised vascular plant list for Voyageurs National Park. Updated from Harris and Foster 2003. Taxonomy and nomenclature generally follow Gleason and Cronquist (1991) and USDA, NRCS (2002). The status of Selaginella densa is pending confirmation of identification. Voucher specimens were collected for species marked *.

FAMILY LYCOPODIACEAE Clubmoss Family Lycopodiella inundata (L.) Holub Inundated Club Moss Lycopodium annotinum L. Stiff Club Moss Lycopodium clavatum L. Common Club Moss Lycopodium complanatum L. Ground-Cedar Lycopodium dendroideum Michx. Tree Ground Pine Lycopodium lucidulum Michx. Shining Club Moss Lycopodium obscurum L. Ground Pine

FAMILY SELAGINELLACEAE Selaginella Family * Selaginella densa Rydb. Lesser Spikemoss Selaginella rupestris (L.) Spring Northern Selaginella

FAMILY ISOETACEAE Quillwort Family * Isoetes lacustris L. Lake Quillwort

FAMILY EQUISETACEAE Horsetail Family Equisetum arvense L. Field Horsetail Equisetum fluviatile L. Water Horsetail Equisetum hyemale L. Scouring Horsetail Equisetum palustre L. Marsh Horsetail Equisetum pratense Ehrh. Meadow Horsetail Equisetum scirpoides Michx. Dwarf Scouringrush Equisetum sylvaticum L. Woodland Horsetail Equisetum variegatum Schleich. ex Fried., Weber & Variegated Scouringrush Mohr

FAMILY OPHIOGLOSSACEAE Adder's Tongue Family Botrychium multifidum (S.G. Gmel.) Rupr. Leathery Grapefern Botrychium virginianum (L.) Swartz Rattlesnake Fern

FAMILY OSMUNDACEAE Royal Fern Family Osmunda cinnamomea L. Cinnamon Fern Osmunda claytoniana L. Interrupted Fern

FAMILY DENNSTAEDTIACEAE Bracken Fern Family Pteridium aquilinum (L.) Kuhn Bracken

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FAMILY THELYPTERIDACEAE Marsh Fern Family Phegopteris connectilis (Michx.) Watt Long Beechfern Thelypteris palustris Schott Marsh Fern

FAMILY DRYOPTERIDACEAE Wood Fern Family Athyrium filix-femina (L.) Roth ex Mert. Common Ladyfern Cystopteris bulbifera (L.) Bernh. Bulblet Bladderfern Cystopteris fragilis (L.) Bernh. Brittle Bladderfern Dryopteris campyloptera Clarkson Mountain Woodfern Dryopteris carthusiana (Vill.) H.P. Fuchs Spinulose Woodfern Dryopteris cristata (L.) A. Gray Crested Woodfern Dryopteris fragrans (L.) Schott Fragrant Woodfern * Gymnocarpium dryopteris (L.) Newman Western Oakfern Gymnocarpium robertianum (Hoffm.) Newman Scented Oakfern Matteuccia struthiopteris (L.) Tod. Ostrich Fern Onoclea sensibilis L. Sensitive Fern * Woodsia ilvensis (L.) R. Br. Rusty Woodsia Woodsia oregana D.C. Eaton Oregon Cliff Fern

FAMILY POLYPODIACEAE Polypody Family Polypodium virginianum L. Rock Polypody

FAMILY PINACEAE Pine Family Abies balsamea (L.) Miller Balsam Fir Larix laricina (Du Roi) K. Koch Tamarack Picea glauca (Moench) Voss White Spruce Picea mariana (Miller) B.S.P. Black Spruce Pinus banksiana Lamb. Jack Pine Pinus nigra Arnold Austrian Pine Pinus resinosa Sol. ex Aiton Red Pine Pinus strobus L. White Pine

FAMILY CUPRESSACEAE Cedar Family Juniperus communis L. Common Juniper Juniperus horizontalis Moench Creeping Juniper Thuja occidentalis L. Eastern Arbovitae

FAMILY TAXACEAE Yew Family Taxus canadensis Marshall Canada Yew

FAMILY ARISTOLOCHIACEAE Duchman's-pipe Family Asarum canadense L. Canadian Wild Ginger

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FAMILY NYMPHAEACEAE Water-lily Family Nuphar luteum (L.) Sm. Varigated Yellow Pond Lily Nuphar rubrodisca Morong Yellow Pond Lily Nymphaea odorata Ait. American White Waterlily

FAMILY CABOMBACEAE Water-shield Family Brasenia schreberi J. Gmel. Watershield

FAMILY CERATOPHYLLACEAE Hornwort Family Ceratophyllum demersum L. Coontail Ceratophyllum echinatum A. Gray Spineless Hornwort

FAMILY RANUNCULACEAE Crowfoot or Buttercup Family Actaea rubra (Aiton) Willd. Red Baneberry Anemone canadensis L. Canada Anemone Anemone cylindrica A. Gray Candle Anemone Anemone quinquefolia L. Nightcaps Anemone virginiana L. Tall Thimbleweed Aquilegia canadensis L. Red Columbine Caltha natans Pall. Floating Marsh Marigold Caltha palustris L. Yellow Marsh Marigold Coptis trifolia (L.) Salisb. Threeleaf Goldthread Hepatica nobilis Schreb. var obtusa Roundlobed Hepatica Ranunculus abortivus L. Littleleaf Buttercup Ranunculus acris L. Tall Buttercup Ranunculus cymbalaria Pursh Alkali Buttercup Ranunculus flabellaris Raf. Yellow Water Buttercup Ranunculus flammula L. Spearwort Buttercup Ranunculus gmelinii DC. Gmelin's Buttercup Ranunculus hispidus Michx. Bristly Buttercup Ranunculus lapponicus L. Lapland Buttercup Ranunculus longirostris Godr. Longbeak Buttercup Ranunculus pensylvanicus L. f. Pennsylvania Buttercup * Ranunculus sceleratus L. Celeryleaf Buttercup Thalictrum dasycarpum Fischer & Avé-Lall. Purple Meadowrue Thalictrum dioicum L. Early Meadowrue Thalictrum venulosum Trel. Veiny Meadowrue

FAMILY PAPAVERACEAE Poppy Family Sanguinaria canadensis L. Bloodroot

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FAMILY FUMARIACEAE Fumitory or Fumewort Family Corydalis aurea Willd. Scrambledeggs Corydalis sempervirens (L.) Pers. Rock Harlequin

FAMILY ULMACEAE Elm Family Ulmus americana L. American Elm

FAMILY URTICACEAE Nettle Family Laportea canadensis (L.) Wedd. Canadian Wood Nettle * Parietaria pensylvanica Muhlenb. ex Willd. Pellitory Urtica dioica L. Stinging Nettle

FAMILY MYRICACEAE Wax-myrtle Family Comptonia peregrina (L.) J.M. Coult. Sweet Fern Myrica gale L. Sweetgale

FAMILY FAGACEAE Beech Family Quercus ellipsoidalis E.J. Hill Northern Pin Oak Quercus macrocarpa Michx. Bur Oak Quercus rubra L. Northern Red Oak

FAMILY BETULACEAE Birch Family Alnus incana (L.) Moench ssp rugosa Speckled Alder Alnus viridis (Villars) DC. ssp crispa American Green Alder Betula alleghaniensis Britton Yellow Birch Betula papyrifera Marshall var. cordifolia Mountain Paper Birch Betula papyrifera Marshall Paper Birch Betula pumila L. Swamp Birch Corylus americana Walter American Hazelnut Corylus cornuta Marshall Beaked Hazelnut Ostrya virginiana (Miller) K. Koch Eastern Hophornbeam

FAMILY CHENOPODIACEAE Goosefoot Family Chenopodium album L. Lambsquarters Chenopodium leptophyllum (Nutt. ex Moq.) Nutt. ex S. Narrowleaf Goosefoot Watson Chenopodium simplex (Torr.) Raf. Mapleleaf Goosefoot

FAMILY AMARANTHACEAE Amaranth Family Amaranthus retroflexus L. Redroot Amaranth

FAMILY PORTULACACEAE Purslane Family Portulaca oleracea L. Little Hogweed

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FAMILY MOLLUGINACEAE Carpetweed Family Mollugo verticillata L. Green Carpetweed

FAMILY CARYOPHYLLACEAE Pink Family Cerastium arvense L. Field Chickweed Cerastium fontanum Baumg. Common Mouse-Ear Chickweed Cerastium nutans Raf. Nodding Chickweed Lychnis chalcedonica L. Maltese Cross Moehringia lateriflora (L.) Fenzl Bluntleaf Sandwort Myosoton aquaticum (L.) Moench Giant Chickweed Silene antirrhina L. Sleepy Silene Silene latifolia Poir. Bladder Campion * Spergularia rubra (L.) J. & C. Presl Red Sandspurry * Stellaria longifolia Muhlenb. ex Willd. Longleaf Starwort Stellaria media (L.) Vill. Common Chickweed

FAMILY POLYGONACEAE Smartweed Family Fagopyrum esculentum Moench Fagopyrum Polygonum achoreum Blake Leathery Knotweed Polygonum amphibium L. Longroot Smartweed Polygonum aviculare L. Prostate Knotweed Polygonum cilinode Michx. Fringed Black Bindweed Polygonum convolvulus L. Black Bindweed Polygonum douglasii Greene Douglas' Knotweed Polygonum hydropiper L. Marshpepper Knotweed * Polygonum lapathifolium L. Curlytop Knotweed Polygonum persicaria L. Spotted Ladysthumb Polygonum punctatum Elliott Dotted Smartweed Polygonum ramosissimum Michx. Bushy Knotweed Polygonum sagittatum L. Arrowleaf Tearthumb Polygonum scandens L. Climbing False Buckwheat Rumex acetosella L. Common Sheep Sorrel Rumex crispus L. Curly Dock Rumex longifolius DC. Dooryard Dock * Rumex maritimus L. Golden Dock Rumex obtusifolius L. Bitter Dock Rumex orbiculatus A. Gray Greater Water Dock Rumex patientia L. Patience Dock Rumex triangulivalvis Meisn. Willow-leaved dock

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FAMILY ELATINACEAE Waterwort Family Elatine minima (Nutt.) Fischer & C.A. Mey. Small Waterwort Elatine triandra Schkuhr Threestamen Waterwort

FAMILY GUTTIFERAE St. John's-wort Family * Hypericum majus (A. Gray) Britton Large St. Johnswort Triadenum fraseri (Spach) Gleason Fraser's Marsh St. Johnswort

FAMILY TILIACEAE Linden Family Tilia americana L. American Basswood

FAMILY SARRACENIACEAE Pitcher-plant Family Sarracenia purpurea L. Purple Pitcherplant

FAMILY DROSERACEAE Sundew Family Drosera rotundifolia L. Roundleaf Sundew

FAMILY CISTACEAE Rock-rose Family Lechea intermedia Legg. Largepod Pinweed

FAMILY VIOLACEAE Violet Family Viola adunca Sm. Hookedspur Violet Viola blanda Brainerd Sweet White Violet Viola canadensis L. var rugulosa Creepingroot Violet Viola conspersa Reichb. American Dog Violet Viola cucullata Aiton Marsh Blue Violet Viola macloskeyi F.E. Lloyd ssp pallens Smooth White Violet Viola novae-angliae House New England Blue Violet Viola pubescens Aiton Downy Yellow Violet Viola renifolia A. Gray White Violet Viola selkirkii Pursh ex Goldie Selkirk's Violet Viola sororia Willd. Common Blue Violet

FAMILY CUCURBITACEAE Gourd Family Echinocystis lobata (Michx.) Torr. & A. Gray Wild Cucumber

FAMILY SALICACEAE Willow Family Populus alba L. White Poplar Populus balsamifera L. Balsam Poplar Populus grandidentata Michx. Bigtooth Aspen Populus tremuloides Michx. Quaking Aspen Salix amygdaloides Anderss. Peachleaf Willow Salix bebbiana Sarg. Bebb Willow Salix candida Flüegge ex Willd. Sageleaf Willow

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Salix discolor Muhlenb. Pussy Willow Salix eriocephala Michx. Missouri River Willow Salix exigua Nutt. Sandbar Willow Salix humilis Marshall Prairie Willow Salix lucida Muhlenb. Shining Willow Salix pedicellaris Pursh Bog Willow Salix petiolaris Anderss. Meadow Willow Salix planifolia Pursh Diamondleaf Willow Salix pyrifolia Anderss. Balsam Willow Salix serissima (L.H. Bailey) Fern. Autumn Willow

FAMILY BRASSICACEAE Mustard Family * Arabis divaricarpa A. Nelson Spreading Rockcress Barbarea vulgaris R. Br. Wintercress Berteroa incana (L.) DC. Hoary Alyssum Brassica kaber (DC.) L.C. Wheeler Charlock Mustard Capsella bursa-pastoris (L.) Medik. Shepherd's Purse Cardamine parviflora L. var arenicola Sand Bittercress Cardamine pensylvanica Muhlenb. ex Willd. Pennsylvania Bittercress * Erysimum cheiranthoides L. Wormseed Wallflower * Lepidium densiflorum Schrad. Common Pepperweed Rorippa islandica (Oeder) Borbás Northern Marsh Yellowcress Rorippa palustris (L.) Besser ssp fernaldiana Fernald's Yellowcress Sinapis arvensis L. Wild Mustard Subularia aquatica L. Water Awlwort Thlaspi arvense L. Field Pennycress

FAMILY ERICACEAE Heath Family Arctostaphylos uva-ursi (L.) Spreng. Kinnikinnick Chamaedaphne calyculata (L.) Moench Leatherleaf Epigaea repens L. Trailing Arbutus Gaultheria hispidula (L.) Muhlenb. ex Bigelow Creeping Snowberry Gaultheria procumbens L. Eastern Teaberry Kalmia polifolia Wangenh. Bog Laurel Ledum groenlandicum Oeder Bog Labrador Tea Vaccinium angustifolium Aiton Lowbush Blueberry Vaccinium caespitosum Michx. Dwarf Bilberry Vaccinium macrocarpon Aiton Cranberry Vaccinium myrtilloides Michx. Velvetleaf Huckleberry Vaccinium oxycoccos L. Small Cranberry Vaccinium vitis-idaea L. Lingonberry

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FAMILY PYROLACEAE Wintergreen Family Chimaphila umbellata (L.) Barton Pipsissewa Moneses uniflora (L.) A. Gray Single Delight Orthilia secunda (L.) House Sidebells Wintergreen Pyrola americana Sweet American Wintergreen Pyrola asarifolia Michx. Liverleaf Wintergreen Pyrola chlorantha Sw. Green Flowered Wintergreen Pyrola elliptica Nutt. Waxflower Shinleaf

FAMILY MONOTROPACEAE Indian Pipe Family Monotropa hypopithys L. Pinesap Monotropa uniflora L. Indianpipe

FAMILY PRIMULACEAE Primrose Family Lysimachia ciliata L. Fringed Loosestrife Lysimachia terrestris (L.) B.S.P. Earth Loosestrife Lysimachia thyrsiflora L. Tufted Loosestrife Trientalis borealis Raf. American Starflower

FAMILY GROSSULARIACEAE Gooseberry or Currant Family Ribes americanum Miller American Black Currant Ribes glandulosum Grauer Skunk Currant Ribes hirtellum Michx. Hairystem Gooseberry Ribes hudsonianum Richardson Northern Black Currant Ribes lacustre (Pers.) Poir. Prickly Currant Ribes oxyacanthoides L. Canadian Gooseberry Ribes triste Pall. Red Currant

FAMILY CRASSULACEAE Stonecrop or Orpine Family Crassula aquatica (L.) Schoenl. Water Pygmyweed Sedum acre L. Goldmoss Stonecrop Sedum hispanicum L. Spanish Stonecrop Sedum telephioides Michx. Allegheny Stonecrop Sempervivum tectorum L. Common Houseleek

FAMILY SAXIFRAGACEAE Saxifrage Family Heuchera richardsonii R. Br. Richardson's Alumroot Mitella nuda L. Naked Miterwort Parnassia palustris L. Northern Grass Parnassus Saxifraga pensylvanica L. Eastern Swamp Saxifrage Saxifraga virginiensis Michx. Alaska Saxifrage

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FAMILY ROSACEAE Rose Family Agrimonia gryposepala Wallr. Tall Hairy Agrimony Agrimonia striata Michx. Roadside Agrimony Amelanchier bartramiana (Tausch) M. Roem. Oblongfruit Serviceberry Amelanchier humilis Wieg Low Serviceberry Amelanchier sanguinea (Pursh) DC. Roundleaf Serviceberry Amelanchier stolonifera Wiegand Running Serviceberry * Aronia melanocarpa (Michx.) Elliott Black Chokeberry Comarum palustre (L.) Scop. Purple Marshlocks Crataegus chrysocarpa Ashe Fireberry Hawthorn Fragaria vesca L. Woodland Strawberry Fragaria virginiana Miller Virginia Strawberry Geum aleppicum Jacq. Yellow Avens Geum macrophyllum Willd. Largeleaf Avens Geum rivale L. Purple Avens Potentilla argentea L. Silver Cinquefoil Potentilla arguta Pursh Tall Cinquefoil Potentilla norvegica L. Norwegian Cinquefoil * Potentilla recta L. Sulphur Cinquefoil * Potentilla simplex Michx. Common Cinquefoil Prunus americana Pursh American Plum Prunus nigra Aiton Canadian Plum Prunus pensylvanica L. f. Pin Cherry Prunus pumila L. Sand Cherry Prunus serotina Ehrh. Black Cherry Prunus virginiana L. Common Chokecherry Rosa acicularis Lindl. Prickly Rose Rosa blanda Aiton Smooth Rose * Rubus acaulis Michx. Northern Dwarf Raspberry Rubus allegheniensis Porter Allegheny Blackberry Rubus canadensis L. Smooth Blackberry Rubus flagellaris Willd. Northern Dewberry Rubus idaeus L. ssp strigosus Grayleaf Red Raspberry Rubus occidentalis L. Black Raspberry Rubus parviflorus Nutt. Thimbleberry Rubus pensilvanicus Poir. Pennsylvania Blackberry Rubus pubescens Raf. Dwarf Red Raspberry Sibbaldiopsis tridentata Sol. ex Aiton Shrubby Fivefingers

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Sorbus americana Marshall American Mountain Ash Sorbus decora (Sarg.) C.K. Schneid. Northern Mountain Ash Spiraea alba Du Roi White Meadowsweet

FAMILY FABACEAE Pea or Pulse Family Amphicarpaea bracteata (L.) Fern. American Hogpeanut Astragalus canadensis L. Canadian Milkvetch Caragana arborescens Lam. Siberian Peashrub Coronilla varia L. Crown Vetch * Desmodium canadense (L.) DC. Showy Ticktrefoil Glycyrrhiza lepidota Nutt. ex Pursh American Licorice Lathyrus ochroleucus Hook. Cream Peavine Lathyrus palustris L. Slender Stem Peavine Lathyrus venosus Muhlenb. ex Willd. Veiny Peavine * Medicago lupulina L. Black Medick Medicago sativa L. Alfalfa Melilotus alba Medik. White Sweetclover Melilotus officinalis (L.) Pall. Yellow Sweetclover Trifolium arvense L. Rabbitfoot Clover Trifolium campestre Schreb. Field Clover Trifolium hybridum L. Alsike Clover Trifolium pratense L. Red Clover Trifolium repens L. White Clover * Vicia americana Muhlenb. ex Willd. American Vetch

FAMILY ELAEAGNACEAE Oleaster Family Shepherdia canadensis (L.) Nutt. Russet Buffaloberry

FAMILY HALORAGACEAE Water-milfoil Family Myriophyllum alterniflorum DC. Alternate Flower Watermilfoil * Myriophyllum farwellii Morong Farwell's Watermilfoil Myriophyllum sibiricum Kom. Shortspike Watermilfoil Myriophyllum tenellum Bigelow Slender Watermilfoil Myriophyllum verticillatum L. Whorl Leaf Watermilfoil

FAMILY LYTHRACEAE Loosestrife Family Lythrum salicaria L. Purple Loosestrife

FAMILY ONAGRACEAE Evening-primrose Family Chamerion angustifolium L. Fireweed Circaea alpina L. Small Enchanter's Nightshade Circaea lutetiana L. ssp canadensis Broadleaf Enchanter's Nightshade Epilobium ciliatum Raf. ssp glandulosum Glandular Willowherb

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Epilobium coloratum Biehler Purpleleaf Willowherb Epilobium leptophyllum Raf. Bog Willowherb Epilobium palustre L. Marsh Willowherb Oenothera biennis L. Common Evening Primrose Oenothera parviflora L. Northern Evening Primrose Oenothera perennis L. Small Evening Primrose

FAMILY CORNACEAE Dogwood Family Cornus alternifolia L. f. Alternate-leaf Dogwood Cornus canadensis L. Bunchberry Cornus racemosa Lam. Gray Dogwood Cornus rugosa Lam. Roundleaf Dogwood Cornus sericea L. ssp sericea Redosier Dogwood

FAMILY SANTALACEAE Sandalwood Family Comandra umbellata (L.) Nutt. Bastard Toadflax

FAMILY VISCACEAE Christmas-mistletoe Family Arceuthobium pusillum Peck Eastern Dwarf Mistletoe

FAMILY CELASTRACEAE Staff-tree Family Celastrus scandens L. American Bittersweet

FAMILY AQUIFOLIACEAE Holly Family Ilex verticillata (L.) A. Gray Common Winterberry

FAMILY EUPHORBIACEAE Spurge Family Chamaesyce glyptosperma (Engelm.) Small Ribseed Sandmat

FAMILY RHAMNACEAE Buckthorn Family Rhamnus alnifolia L'Hér. Alder Leaf Buckthorn

FAMILY VITACEAE Grape or Vine Family Parthenocissus quinquefolia (L.) Planchon ex DC. Virginia Creeper Parthenocissus vitacea (A. Kern.) Fritsch Woodbine Vitis riparia Michx. Riverbank Grape

FAMILY ACERACEAE Maple Family Acer negundo L. Boxelder Acer rubrum L. Red Maple Acer saccharinum L. Silver Maple Acer spicatum Lam. Mountain Maple

FAMILY ANACARDIACEAE Sumac or Cashew Family Rhus glabra L. Smooth Sumac

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Rhus hirta (L.) Sudworth Staghorn Sumac Toxicodendron radicans (L.) Kuntze Eastern Poison Ivy

FAMILY OXALIDACEAE Wood Sorrel Family Oxalis stricta L. Common Yellow Oxalis

FAMILY GERANIACEAE Geranium Family Geranium bicknellii Britton Bicknell's Cranesbill

FAMILY BALSAMINACEAE Touch-me-not Family Impatiens capensis Meerb. Jewelweed

FAMILY ARALIACEAE Ginseng Family Aralia hispida Vent. Bristly Sarsaparilla Aralia nudicaulis L. Wild Sarsaparilla Aralia racemosa L. American Spikenard

FAMILY APIACEAE Carrot or Parsley Family Aegopodium podagraria L. Bishop's Goutweed Cicuta bulbifera L. Bulblet Bearing Water Hemlock Cicuta maculata L. Spotted Water Hemlock Heracleum maximum Bartr. Common Cowparsnip Osmorhiza claytonii (Michx.) C.B. Clarke Clayton's Sweetroot Osmorhiza longistylis (Torr.) DC. Longstyle Sweetroot * Pastinaca sativa L. Wild Parsnip Sanicula marilandica L. Maryland Sanicle Sium suave Walter Hemlock Waterparsnip Zizia aptera (A. Gray) Fern. Meadow Zizia

FAMILY GENTIANACEAE Gentian Family Gentiana andrewsii Griseb. Closed Bottle Gentian Gentianopsis crinita (Froel.) Ma Greater Fringed Gentian Halenia deflexa (Sm.) Griseb. American Spurred Gentian

FAMILY APOCYNACEAE Dogbane Family Apocynum androsaemifolium L. Spreading Dogbane Apocynum cannabinum L. Indianhemp

FAMILY ASCLEPIADACEAE Milkweed Family Asclepias incarnata L. Swamp Milkweed Asclepias syriaca L. Common Milkweed

FAMILY SOLANACEAE Potato or Nightshade Family Physalis pubescens L. Husk Tomato Solanum dulcamara L. Climbing Nightshade

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FAMILY CONVOLVULACEAE Morning-glory Family Calystegia spithamaea (L.) Pursh Low False Bindweed Convolvulus sepium L. Hedge False Bindweed Cuscuta cephalanthi Engelm. Buttonbush Dodder Cuscuta gronovii Willd. ex Schultz Scaldweed

FAMILY MENYANTHACEAE Buckbean Family Menyanthes trifoliata L. Common Buckbean

FAMILY POLEMONIACEAE Phlox or Polemonium Family Phlox pilosa L. Downy Phlox

FAMILY BORAGINACEAE Borage Family Cynoglossum virginianum L. var boreale Wild Comfrey Hackelia deflexa (Wahlenb.) Opiz Nodding Stickseed Mertensia paniculata (Aiton) G. Don Tall Bluebells Myosotis scorpioides L. True Forget-Me-Not

FAMILY VERBENACEAE Vervain Family Verbena hastata L. Swamp Verbena

FAMILY LAMIACEAE Mint Family Agastache foeniculum (Pursh) Kuntze Blue Giant Hyssop * Clinopodium vulgare L. Wild Basil Dracocephalum parviflorum Nutt. American Dragonhead Glechoma hederacea L. Ground Ivy Lycopus americanus Muhlenb. ex Bartram American Water-horehound Lycopus uniflorus Michx. Northern Bugleweed Mentha arvensis L. Wild Mint Mentha spicata L. Spearmint Monarda didyma L. Scarlet Beebalm Prunella vulgaris L. Common Selfheal Scutellaria galericulata L. Marsh Skullcap Scutellaria lateriflora L. Blue Skullcap Stachys palustris L. Marsh Hedgenettle Stachys tenuifolia Willd. Smooth Hedgenettle

FAMILY CALLITRICHACEAE Water-starwort Family Callitriche palustris L. Vernal Waterstarwort

FAMILY PLANTAGINACEAE Plantain Family * Littorella uniflora (L.) Aschers. American Shore-plantain Plantago major L. Common Plantain Plantago rugelii Decne. Blackseed Plantain

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FAMILY OLEACEAE Olive Family Fraxinus nigra Marshall Black Ash Fraxinus pennsylvanica Marshall Green Ash Syringa vulgaris L. Common Lilac

FAMILY SCROPHULARIACEAE Figwort Family Agalinis tenuifolia (Vahl) Raf. Slenderleaf False Foxglove Gratiola neglecta Torr. Clammy Hedge Hyssop Linaria vulgaris Miller Butter and Eggs Melampyrum lineare Desr. Narrowleaf Cow Wheat Mimulus ringens L. Ringen Monkeyflower Pedicularis canadensis L. Canadian Lousewort Penstemon gracilis Nutt. Lilac Penstemon Scrophularia marilandica L. Carpenter's-square Figwort Verbascum thapsus L. Common Mullein Veronica arvensis L. Corn Speedwell Veronica peregrina L. Neckweed Veronica scutellata L. Skullcap Speedwell Veronica serpyllifolia L. Thyme-leaved Speedwell

FAMILY LENTIBULARIACEAE Bladderwort Family Utricularia intermedia Hayne Flatleaf Bladderwort Utricularia macrorhiza Le Conte Common Bladderwort

FAMILY CAMPANULACEAE Bluebell or Bellflower Family Campanula aparinoides Pursh Marsh Bellflower Campanula rapunculoides L. Rampion Bellflower Campanula rotundifolia L. Bluebell Bellflower Lobelia dortmanna L. Dortmann's cardinalflower Lobelia inflata L. Indian Tobacco

FAMILY RUBIACEAE Madder Family Galium asprellum Michx. Rough Bedstraw Galium boreale L. Northern Bedstraw * Galium labradoricum (Wiegand) Wiegand Northern Bog Bedstraw * Galium mollugo L. White Bedstraw Galium obtusum Bigelow Bluntleaf Bedstraw Galium trifidum L. Three Petal Bedstraw Galium triflorum Michx. Fragrant Bedstraw Houstonia longifolia Gaertn. Longleaf Summer Bluet

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FAMILY CAPRIFOLIACEAE Honeysuckle Family Diervilla lonicera Miller Northern Bush Honeysuckle Linnaea borealis L. Twinflower Lonicera caerulea L. Sweetberry Honeysuckle Lonicera canadensis Bartram American Fly Honeysuckle Lonicera dioica L. Limber Honeysuckle * Lonicera hirsuta Eaton Hairy Honeysuckle Lonicera morrowii A. Gray Morrow's Honeysuckle Lonicera oblongifolia (Goldie) Hook. Swamp Fly Honeysuckle Lonicera tatarica L. Tartarian Honeysuckle Lonicera villosa (Michx.) Roem. & Schult. Mountain Fly Honeysuckle Sambucus racemosa L. var racemosa Elderberry Symphoricarpos albus (L.) S.F. Blake Common Snowberry Viburnum lentago L. Nannyberry Viburnum opulus Ait. American Cranberrybush Viburnum rafinesquianum Schult. Downy Arrowwood

FAMILY ASTERACEAE Composite or Aster Family Achillea millefolium L. Common Yarrow Ambrosia artemisiifolia L. Annual Ragweed Ambrosia psilostachya DC. Cuman Ragweed Anaphalis margaritacea (L.) Benth. & Hook. f. ex C.B. Western Pearlyeverlasting Clarke Antennaria neglecta Greene Field Pussytoes Antennaria neodioica Greene Pussytoes Antennaria parlinii Fern. Parlin's Pussytoes Arctium minus (Hill) Bernh. Lesser Burrdock Aster borealis (Torr. & A. Gray) Prov. Rush Aster Aster lanceolatus Willd. ssp lanceolatus White Panicle Aster Aster lateriflorus (L.) Britton Calico Aster Aster macrophyllus L. Bigleaf Aster Aster puniceus L. Purplestem Aster Balsamita major Desf. Cost Mary Bidens cernua L. Nodding Beggartick Bidens frondosa L. Devil's Beggartick Bidens tripartita L. Threelobe Beggarticks Cirsium arvense (L.) Scop. Canada Thistle Cirsium muticum Michx. Swamp Thistle Cirsium vulgare (Savi) Ten. Bull Thistle Conyza canadensis (L.) Cronquist Canadian Horseweed

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Doellingeria umbellata (P. Mill.) Nees var umbellata Parasol Whitetop Doellingeria umbellata var. pubens (P. Mill.) Nees var Parasol Whitetop pubens Erigeron glabellus Nutt. Streamside Fleabane Erigeron philadelphicus L. Philadelphia Fleabane Erigeron strigosus Muhlenb. ex Willd. Prairie Fleabane Eupatorium maculatum L. Spotted Joe Pye Weed Eupatorium perfoliatum L. Common Boneset Eupatorium purpureum L. var purpureum Sweetscented Joe Pye Weed Euthamia graminifolia (L.) Nutt. Flattop Goldentop Galinsoga quadriradiata Rúiz, Lopez & Pavón Shaggy Soldier * Gnaphalium uliginosum L. Low Cudweed Helianthus giganteus L. Giant Sunflower Helianthus tuberosus L. Jerusalem Artichoke * Hieracium aurantiacum L. Orange Hawkweed Hieracium canadense Michx. Canadian Hawkweed Hieracium kalmii L. Kalm's Hawkweed Hieracium piloselloides Vill. Tall Hawkweed Hieracium scabrum Michx. Rough Hawkweed Hieracium umbellatum L. Narrowleaf Hawkweed Lactuca biennis (Moench) Fern. Tall Blue Lettuce Lactuca canadensis L. Canada Lettuce Leucanthemum vulgare Lam. Oxeye Daisy Matricaria discoidea DC. Disc Mayweed Matricaria matricarioides (Less.) Porter Pineapple Weed Megalodonta beckii (Torr. ex Spreng) Greene Aquatic Beggartick Petasites frigidus (L.) Fr. var palmatus Arctic Sweet Coltsfoot Petasites sagittatus (Banks ex Pursh) A. Gray Arrowleaf Sweet Coltsfoot Prenanthes alba L. White Rattlesnakeroot Rudbeckia hirta L. Blackeyed Susan Senecio aureus L. Golden Ragwort Senecio pauperculus Michx. Balsam Groundsel Solidago canadensis L. Canada Goldenrod Solidago gigantea Aiton Giant Goldenrod Solidago hispida Muhlenb. Hairy Goldenrod Solidago missouriensis Nutt. Missouri Goldenrod Solidago nemoralis Aiton Dyersweed Goldenrod Solidago uliginosa Nutt. Bog Goldenrod Sonchus arvensis L. Field Sowthistle Sonchus asper (L.) Hill Spiny Sowthistle

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Symphyotrichium ericoides L. var ericoides Heath Aster Symphyotrichum ciliolatum Lindl. Lindley's aster Taraxacum officinale G. Weber Common Dandelion Tragopogon dubius Scop. Goat's Beard

FAMILY ALISMATACEAE Water-plantain Family Alisma subcordatum Raf. American Water Plantain Alisma triviale Pursh Northern Water Plantain Sagittaria cristata Engelm. Crested Arrowhead Sagittaria cuneata E. Sheld. Arumleaf Arrowhead Sagittaria graminea Michx. Grassy Arrowhead Sagittaria latifolia Willd. Broadleaf Arrowhead Sagittaria rigida Pursh Sessilefruit Arrowhead

FAMILY HYDROCHARITACEAE Frog's-bit Family Elodea canadensis Rich. ex Michx. Canadian Waterweed Vallisneria americana Michx. American Eelgrass

FAMILY SCHEUCHZERIACEAE Scheuchzeria Family Scheuchzeria palustris L. ssp americana Rannoch-rush

FAMILY JUNCAGINACEAE Arrow-grass Family Triglochin maritimum L. Seaside Arrowgrass Triglochin palustre L. Marsh Arrowgrass

FAMILY POTAMOGETONACEAE Pondweed Family Potamogeton amplifolius Tuckerm. Largeleaf Pondweed Potamogeton epihydrus Raf. Ribbonleaf Pondweed * Potamogeton filiformis Pers. ssp filiformis Fineleaf Pondweed * Potamogeton foliosus Raf. Leafy Pondweed Potamogeton friesii Rupr. Fries' Pondweed * Potamogeton gramineus L. Variableleaf Pondweed Potamogeton natans L. Floating Pondweed * Potamogeton pectinatus L. Sago Pondweed Potamogeton pusillus L. Small Pondweed * Potamogeton richardsonii (A. Bennett) Rydb. Richardson's Pondweed Potamogeton robbinsii Oakes Robbin's Pondweed Potamogeton spirillus Tuckerm. Spiral Pondweed Potamogeton vaseyi Robb. Vasey's Pondweed Potamogeton zosteriformis Fern. Flatstem Pondweed

FAMILY NAJADACEAE Water-nymph or Naiad Family Najas flexilis (Willd.) Rost. & W. Schmidt Nodding Water Nymph

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FAMILY ARACEAE Arum Family Acorus americanus (Raf.) Raf. Sweetflag Arisaema triphyllum (L.) Schott Jack in the Pulpit Calla palustris L. Water Arum

FAMILY LEMNACEAE Duckweed Family Lemna minor L. Common Duckweed Lemna trisulca L. Star Duckweed Spirodela polyrhiza (L.) Schleid. Giant Duckweed

FAMILY ERIOCAULACEAE Pipewort Family Eriocaulon aquaticum (Hill) Druce Sevenangle Pipewort

FAMILY JUNCACEAE Rush Family Juncus balticus Willd. Baltic Rush Juncus brevicaudatus (Engelm.) Fern. Narrow Panicle Rush Juncus bufonius L. Toad Rush Juncus dudleyi Wiegelb Dudley's Rush Juncus effusus L. Common Rush Juncus filiformis L. Thread Rush Juncus greenei Oakes & Tuckerm. Greene's Rush * Juncus interior Wiegand Inland Rush Juncus nodosus L. Jointed Rush Juncus pelocarpus E. Mey. Brownfruit Rush Juncus tenuis Willd. Poverty Rush Luzula acuminata Raf. Hairy Wood Rush Luzula campestris (L.) DC. Field Wood Rush

FAMILY CYPERACEAE Sedge Family Bolboschoenus fluviatilis (Torr.) M.T. Strong River Bulrush Carex adusta Boott Lesser Brown Sedge Carex aenea Fern. Bronze Sedge Carex aquatilis Wahlenb. Water Sedge Carex arcta Boott Bear Sedge Carex arctata Boott Drooping Woodland Sedge Carex atherodes Spreng. Slough Sedge Carex aurea Nutt. Golden Sedge Carex bebbii (L.H. Bailey) Olney ex Fern. Bebb's Sedge Carex brevior (Dewey) Mack. ex Lunell Fescue Sedge Carex brunnescens (Pers.) Poir. ex Lam. Brownish Sedge Carex canescens L. Silvery Sedge Carex castanea Wahlenb. Chestnut Sedge

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Carex chordorrhiza Ehrh. ex L. f. Creeping Sedge * Carex crawfordii Fern. Crawford's Sedge * Carex crinita Lam. Fringed Sedge Carex cristatella Britton Crested Sedge Carex cryptolepis Mack. Northeastern Sedge Carex deflexa Hornem. Northern Sedge Carex deweyana Schwein. Dewey Sedge Carex diandra Schrank Lesser Panicled Sedge Carex disperma Dewey Softleaf Sedge Carex echinata Murray ssp echinata Prickly Sedge Carex gracillima Schwein. Graceful Sedge * Carex gynocrates Wormsk. ex Drejer Northern Bog Sedge Carex haydenii Dewey Hayden's Sedge Carex hirta L. Hammer Sedge Carex houghtoniana Torr. ex Dewey Houghton's Sedge * Carex interior L.H. Bailey Inland Sedge Carex intumescens Rudge Greater Bladder Sedge Carex lacustris Willd. Hairy Sedge Carex lasiocarpa Ehrh. Woollyfruit Sedge Carex lenticularis Michx. Tufted Sedge Carex leptalea Wahlenb. Bristlystalked Sedge * Carex leptonervia (Fern.) Fern. Nerveless Woodland Sedge Carex limosa L. Mud Sedge Carex livida (Wahlenb.) Willd. Livid Sedge Carex magellanica Lam. ssp magellanica Little Sedge Carex merritt-fernaldii Mack. Merritt Fernald's Sedge Carex muricata L. Rough Sedge Carex oligosperma Michx. Fewseed Sedge Carex pauciflora Lightf. Star Sedge Carex peckii Howe Peck's Sedge Carex pedunculata Muhlenb. ex Willd. Longstalk Sedge Carex pellita Muhl ex Willd. Woolly Sedge Carex pensylvanica Lam. Pennsylvania Sedge Carex projecta Mack. Necklace Sedge Carex retrorsa Schwein. Knotsheath Sedge Carex rosea Schkuhr ex Willd. Rosy Sedge Carex rostrata Stokes Beaked Sedge Carex scoparia Schkuhr ex Willd. Broom Sedge Carex stipata Muhlenb. ex Willd. Owlfruit Sedge Carex stricta Lam. Uptight Sedge

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* Carex sychnocephala J. Carey Manyhead Sedge * Carex tenera Dewey Quill Sedge Carex tenuiflora Wahlenb. Sparse Flower Sedge Carex tonsa (Fern.) Bicknell Shaved Sedge Carex trisperma Dewey Threeseeded Sedge Carex tuckermanii Dewey Tuckerman's Sedge Carex umbellata Schkuhr ex Willd. Parasol Sedge Carex vesicaria L. Blister Sedge Carex viridula Michx. Little Green Sedge Carex vulpinoidea Michx. Fox Sedge Cyperus squarrosus L. Bearded Flatsedge * Cyperus strigosus L. Strawcolored Flatsedge Dulichium arundinaceum (L.) Britton Threeway Sedge Eleocharis acicularis (L.) Roem. & Schult. Needle Spikerush * Eleocharis elliptica Kunth Elliptic Spikerush * Eleocharis obtusa (Willd.) Schult. Blunt Spikerush * Eleocharis ovata (Roth) Roem. & Schult. Ovate Spikerush Eleocharis smallii Britton Small's Spikerush Eriophorum angustifolium Honck. Tall Cottongrass Eriophorum chamissonis C.A. Mey. Chamisso's Cottongrass Eriophorum gracile Koch ex Roth Slender Cottongrass Eriophorum tenellum Nutt. Fewnerved Cottongrass Eriophorum vaginatum L. var spissum Tussock Cottongrass Eriophorum virginicum L. Tawny Cottongrass Eriophorum viridi-carinatum (Engelm.) Fern. Thinleaf Cottonsedge Fimbristylis autumnalis (L.) Roem. & Schult. Autumn Sedge Lipocarpha micrantha (M. Vahl) G.C. Tucker Smallflower Hemicarpha Schoenoplectus acutus (Muhl. ex Bigelow) A.& D. Hardstem Bulrush Löve var acutus Schoenoplectus heterochaetus (Chase) Soják Prairie Bulrush Schoenoplectus subterminalis (Torr.) Soják Swaying Bulrush Scirpus atrovirens Willd. Green Bulrush Scirpus cyperinus (L.) Kunth Woolgrass Scirpus microcarpus C. Presl Panicled Bulrush Scirpus validus L. Softstem Bulrush

FAMILY POACEAE Grass Family Agrostis capillaris L. Colonial Bentgrass Agrostis gigantea Roth Redtop Agrostis hyemalis (Walter) B.S.P. Winter Bentgrass Agrostis perennans (Walter) Tuckerm. Upland Bentgrass

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Agrostis scabra Willd. Rough Bentgrass Agrostis stolonifera L. Creeping Bentgrass Alopecurus aequalis Sobol. Shortawn Foxtail * Alopecurus pratensis L. Meadow Foxtail Andropogon gerardii Vitman Big Bluestem Avena sativa L. Oats Beckmannia syzigachne (Steud.) Fern. Slough Grass Brachyelytrum erectum (Schreb.) P. Beauv. Bearded Shorthusk Bromus ciliatus L. Fringed Brome Bromus inermis Leyss. Smooth Brome Calamagrostis canadensis (Michx.) P. Beauv. Bluejoint Calamagrostis stricta (Timm) Koeler ssp inexpansa Northern Reedgrass Cinna latifolia (Trevir. ex Goepp.) Griseb. in Ledeb. Drooping Woodreed Dactylis glomerata L. Orchardgrass Danthonia spicata (L.) P. Beauv. ex Roem. & Schult. Poverty Danthonia * Deschampsia caespitosa (L.) P. Beauv. Tufted Hairgrass Dichanthelium acuminatum Sw. Tapered Rosette Grass Dichanthelium boreale Nash Northern Panicgrass Dichanthelium lanuginosum Ell. Western Panicgrass Dichanthelium linearifolium Nash Slimleaf Panicum Dichanthelium xanthophysum A. Gray Slender Rosette Grass Digitaria ischaemum (Schreb. ex Schwein.) Schreb. Smooth Crabgrass ex Muhlenb. Echinochloa crusgalli (L.) P. Beauv. Barnyard Grass Elymus trachycaulus (Link) Gould in Shinn. ssp Slender Wheatgrass trachycaulus Elymus virginicus L. Virginia Wildrye Elytrigia repens (L.) Desv. ex B.D. Jackson var Quackgrass repens Eragrostis hypnoides (Lam.) B.S.P. Teal Lovegrass Eragrostis pectinacea (Michx.) Nees ex Steud. Tufted Lovegrass Festuca arundinacea Schreb. Tall Fescue Festuca ovina L. Sheep Fescue * Festuca rubra L. Red Fescue Glyceria borealis (Nash) Batch. Northern Mannagrass Glyceria canadensis (Michx.) Trin. Rattlesnake Mannagrass Glyceria grandis S. Watson American Mannagrass Glyceria striata (Lam.) A. Hitchc. Fowl Mannagrass Hierochloe odorata (L.) P. Beauv. Sweetgrass Hordeum jubatum L. Foxtail Barley Leersia oryzoides (L.) Sw. Rice Cutgrass

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* Lolium perenne L. Perennial Ryegrass Muhlenbergia frondosa (Poir. in Lam.) Fern. Wirestem Muhly Muhlenbergia glomerata (Willd.) Trin. Spiked Muhly Muhlenbergia mexicana (L.) Trin Mexican Muhly Muhlenbergia racemosa (Michx.) B.S.P. Marsh Muhly Oryzopsis asperifolia Michx. Roughleaf Ricegrass Oryzopsis pungens (Torr. ex Spreng.) A. Hitchc. Mountain Ricegrass Panicum capillare L. Witchgrass * Panicum depauperatum Muhlenb. Starved Panicgrass Panicum philadelphicum Bernh. ex Trin. Philadelphia Panicgrass Panicum virgatum L. Switchgrass Phalaris arundinacea L. Reed Canarygrass Phleum pratense L. Timothy Phragmites australis (Cav.) Trin. ex Steud. Common Reed Poa alsodes A. Gray Grove Bluegrass Poa annua L. Annual Bluegrass Poa compressa L. Canada Bluegrass Poa glauca Vahl Glaucous Bluegrass Poa interior Rydb. Inland Bluegrass Poa palustris L. Fowl Bluegrass Poa pratensis L. Kentucky Bluegrass Puccinellia distans (Jacq.) Parl. Weeping Alkaligrass Schizachne purpurascens (Torr.) Swallen False Melic Setaria pumila (Poir.) Schult. Yellow Bristlegrass Setaria viridis (L.) P. Beauv. Green Bristlegrass Sorghastrum nutans (L.) Nash Indian Grass Spartina pectinata Link Prairie Cordgrass Sphenopholis intermedia (Rydb.) Rydb. Slender Wedgescale Torreyochloa pallida (Torr.) Church Pale False Mannagrass Zizania palustris L. Northern Wild Rice

FAMILY SPARGANIACEAE Bur-reed Family Sparganium americanum Nutt. American Burreed Sparganium angustifolium Michx. Narrowleaf Burreed Sparganium erectum Rydb. Simplestem Burreed Sparganium eurycarpum Engelm. ex A. Gray Broadfruit Burreed Sparganium fluctuans (Morong) Robinson Floating Burreed * Sparganium glomeratum (Laestad.) L. Neum. Clustered Burreed Sparganium natans L. Small Burreed

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FAMILY TYPHACEAE Cat-tail Family Typha angustifolia L. Narrowleaf Cattail Typha latifolia L. Broadleaf Cattail

FAMILY PONTEDERIACEAE Water-hyacinth Family * Heteranthera dubia (Jacq.) MacMill. Grassleaf Mudplantain Pontederia cordata L. Pickerelweed

FAMILY LILIACEAE Lily Family Allium schoenoprasum L. Chives Allium stellatum Fraser ex Ker Gawl. Autumn Onion Asparagus officinalis L. Asparagus Clintonia borealis (Aiton) Raf. Yellow Bluebeadlily Lilium lancifolium Thunb. Tiger Lily Lilium michiganense Farw. Michigan Lily Maianthemum canadense Desf. Canada Beadruby Maianthemum racemosum (L.) Link ssp racemosum Feather Solomon's Seal Maianthemum stellatum (L.) Link Starry False Solomon's Seal Maianthemum trifolium (L.) Sloboda Threeleaf False Solomon's Seal Polygonatum biflorum (Walter) Ell. King Solomon's Seal Polygonatum pubescens (Willd.) Pursh Hairy Solomon's Seal Streptopus lanceolatus (Ait.) Reveal var roseus Twistedstalk Trillium cernuum L. Whippoorwill Flower Uvularia grandiflora Sm. Large Flower Bellwort Uvularia sessilifolia L. Sessileleaf Bellwort

FAMILY IRIDACEAE Iris Family Iris germanica L. German Iris Iris versicolor L. Harlequin Blueflag Sisyrinchium montanum Greene Mountain Blue Eyed Grass

FAMILY SMILACACEAE Catbrier or Smilax Family Smilax herbacea L. Smooth Carrion Flower

FAMILY ORCHIDACEAE Orchid or Orchis Family Amerorchis rotundifolia (Banks ex Pursh) Hultén Roundleaf Orchid Arethusa bulbosa L. Dragon's Mouth Calopogon tuberosus (L.) B.S.P. Tuberous Grasspink Calypso bulbosa (L.) Oakes Fairyslipper Orchid Corallorhiza maculata (Raf.) Raf. Summer Coralroot Corallorhiza striata Lindl. Hooded Coralroot Corallorhiza trifida Châtel Yellow Coralroot

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Cypripedium acaule Aiton Pink Lady's Slipper Cypripedium calceolus L. Yellow Lady's Slipper Cypripedium reginae Walter Showy Lady's Slipper Goodyera repens (L.) R. Br. Lesser Rattlesnake Plantain Goodyera tesselata Lodd. Checkered Rattlesnake Plantain Liparis loeselii (L.) Rich. ex Lindl. Yellow Widelip Orchid Listera cordata (L.) R. Br. Heartleaf Twayblade Malaxis brachypoda (Gray) Fern. White Adder's-Mouth Orchid Malaxis unifolia Michx. Green Adder's-Mouth Orchid Platanthera dilatata (Pursh) Lindl. ex Beck Boreal Bog Orchid Platanthera hookeri (Torr. ex A. Gray) Lindl. Hooker's Orchid Platanthera hyperborea (L.) Lindl. Northern Green Orchid Platanthera obtusata (Banks ex Pursh) Lindl. Blunt Bog Orchid Platanthera orbiculata (Pursh) Lindl. Large Roundleaved Orchid Platanthera psycodes (L.) Lindl. Lesser Purple Fringed Orchid * Pogonia ophioglossoides (L.) Juss. Snakemouth Orchid Spiranthes lacera (Raf.) Raf. Northern Slender Ladiestresses

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