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ATTACHMENT SS2 REGION 2 SENSITIVE SPECIES EVALUATION FORM Species: Draba fladnizensis var. pattersonii / Arctic Draba, White Arctic Whitlow-grass Criteria Rank Rationale Literature Citations Arctic Draba occurs in the Absaroka and Beartooth mountains on the Shoshone • Dorn 2001 1 AD National Forest in Park County, Wyoming, and in the Bighorn Mountains in Johnson Distribution • Fertig 1998, 2000b within R2 County, Wyoming. It also occurs in Colorado on the Arapaho-Roosevelt, White River, • Fertig and Bynum 1994 Pike-San Isabel, Routt, Grand Mesa-Uncompahgre-Gunnison, and San Juan and Rio • Nelson 1984 Grande national forests, therefore, additional information is needed to determine its • Scott 1997 status in Region 2. • University of Wyoming 1998 • Welp et al. 2000 This species is found in fellfields, on talus slopes, and in alpine and mountain turf meadows. Wyoming populations occur at 10,200-12,000 feet. This high elevation habitat is discontinuous in the landscape. Confidence in Rank Low The variety pattersonii is a regional endemic of western Wyoming, Colorado, and • Dorn 2001 2 AB Utah. In Wyoming, it is might also occur outside of Region 2 based on unconfirmed Distribution • Fertig 2000a, b outside R2 reports from the Teton Range in Teton County. Reports from the Wind River Range • Hitchcock 1941 (Fertig 1992) and Medicine Bow Range (Nelson 1984) are based on misidentified • Hitchcock and Cronquist 1964 specimens of D. crassifolia. • Rollins 1993 • Scott 1997 Confidence in Rank High 3 D Not known. • - Dispersal Capability Confidence in Rank High Arctic Draba is known from 6-7 occurrences in Wyoming. Four of these have been • Fertig 1992 4 AD discovered or revisited since 1983. Most are on the Shoshone or Bighorn national Abundance in • Fertig 1998 R2 forests. Census data are lacking for all occurrences, but populations are thought to be • Fertig 2000b small. Arctic draba is ranked “S2” in Wyoming and “S2S3” in Colorado. • Fertig and Bynum 1994 • Scott 1997 Confidence in Rank Low • Welp et al. 2000 • WYNDD 2001 USDA-Forest Service R2 Sensitive Species Evaluation Form Page 1 of 4 ATTACHMENT SS2 Species: Draba fladnizensis var. pattersonii / Arctic Draba, White Arctic Whitlow-grass Criteria Rank Rationale Literature Citations 5 D Not known. • - Population Trend in R2 Confidence in Rank High 6 D Not known. • - Habitat Trend in R2 Confidence in Rank High Threats are low due to inaccessible habitat. Arctic Draba occurs on lands managed • Fertig 1992, 1998, 1999, 7 C as wilderness and a proposed Research Natural Area by the Shoshone and Bighorn Habitat 2000a, 2000b Vulnerability National Forests. It is also reported for Grand Teton National Park. • Fertig and Bynum 1994 or • Welp et al. 2000 Modification Confidence in Rank High 8 D Arctic Draba is a tufted, perennial forb that flowers and fruits from July to August. • Hitchcock 1941 There are 10 to 20 seeds per silicle, each under 1 mm long. Life History • Hitchcock and Cronquist 1964 and • Scott 1997 Demographics Additional information on this species, including life history stages, population • USDA Forest Service 2002 structure, longevity, mortality, and seed biology, are not available. Confidence in Rank High Initial Evaluator(s): Date: January 31, 2002 Joy Handley, Bonnie Heidel and Scott Laursen National Forests in the Rocky Mountain Region where species is KNOWN (K) or LIKELY(L)1 to occur: 1 Likely is defined as more likely to occur than not occur on the National Forest or Grassland. This generally can be thought of as having a 50% chance or greater of appearing on NFS lands. USDA-Forest Service R2 Sensitive Species Evaluation Form Page 2 of 4 ATTACHMENT SS2 Colorado NF/NG Kansas NF/NG Nebraska NF/NG South Dakota Wyoming NF/NG NF/NG y y y y y Known Likel Known Likel Known Likel Known Likel Known Likel Arapaho-Roosevelt NF X Cimmaron NG Samuel R.McKelvie NF Black Hills NF Shoshone NF X White River NF X Halsey NF Buffalo Gap NG Bighorn NF X Routt NF X Nebraska NF Ft. Pierre NG Black Hills NF Grand Mesa, X Ogalala NG Medicine Bow NF Uncompahgre, Gunnison NF San Juan NF X Thunder Basin NG Rio Grande NF X Pike-San Isabel NF X Comanche NG Literature cited Dorn, R.D. 2001. Vascular Plants of Wyoming, third edition. Mountain West Publishing, Cheyenne, WY. Fertig, W. 1992. Checklist of the Vascular plant flora of the west slope of the Wind River Range and status report on the sensitive plant species of Bridger-Teton National Forest. Unpublished report prepared for the Bridger-Teton National Forest by the Rocky Mountain Herbarium, University of Wyoming. Fertig, W. 1998. The status of rare plants on Shoshone National Forest: 1995-97 survey results. Report prepared by the Wyoming Natural Diversity Database, Laramie, WY. Fertig, W. 1999. The status of rare plants in the Bighorn Landscape. Report prepared for The Nature Conservancy Wyoming Field Office by the Wyoming Natural Diversity Database, Laramie, Wyoming. Fertig, W. 2000a. Rare vascular plant species in the Wyoming portion of the Utah-Wyoming Rocky Mountains Ecoregion. Prepared for the Wyoming Nature Conservancy by the Wyoming Natural Diversity Database, Laramie, WY. Fertig, W. 2000b. State Species Abstract: Draba fladnizensis var. pattersonii. Wyoming Natural Diversity Database. Available on the internet at www.uwyo.edu/wyndd Fertig, W. and M. Bynum. 1994. Biological report on the Proposed Twin Lakes Research Natural Area. Unpublished report prepared for Shoshone National Forest by the Wyoming Natural Diversity Database, Laramie, Wyoming. Hitchcock, C.L. 1941. A revision of the Drabas of western North America. University of Washington Publ. Biology 11:1-132. Hitchcock, C.L. and A. Cronquist. 1964. Pt. 2. Salicaceae to Saxifragaceae. In: Hitchcock, C.L., A. Cronquist, M. Ownbey, and J.W. Thompson. Vascular Plants of the Pacific Northwest. University of Washington Publications in Biology 17(1): 1-914. USDA-Forest Service R2 Sensitive Species Evaluation Form Page 3 of 4 ATTACHMENT SS2 Lesica, P. & J. S. Shelly. 1991. Sensitive, Threatened and Endangered Vascular Plants of Montana. Montana Natural Heritage Program, Occ. Publ. No. 1. Helena, MT. Mulligan, G.A. 1974. Cytotaxonomic studies of Draba and its close allies in Canada and Alaska. Canadian Journal of Botany 52: 1793-1801. Nelson, B. E. 1984. Vascular Plants of the Medicine Bow Range. Jelm Mountain Press, Laramie, WY. Rollins, R.C. 1993. The Cruciferae of Continental North America, Systematics of the Mustard Family from the Arctic to Panama. Stanford Univ. Press, Stanford, CA. Scott, R.W. 1997. The Alpine Flora of the Rocky Mountains. Volume 1 The Middle Rockies. University of Utah Press, Salt Lake City, UT. University of Wyoming – Rocky Mountain Herbarium. 1998. Atlas of the Flora of Wyoming. Posted electronically through 1998 at: http://www.esb.utexas.edu/tchumley/wyomap/ and unposted accession information at the Rocky Mountain Herbarium through 2001. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (2002, January). Fire Effects Information System, [Online]. Available: http://www.fs.fed.us/database/feis/2002. Welp, L., W.F. Fertig, G.P. Jones, G.P. Beauvais, and S.M. Ogle. 2000. Fine filter analysis of the Bighorn, Medicine Bow, and Shoshone National Forests in Wyoming. Wyoming Natural Diversity Database, Laramie, WY. Wyoming Natural Diversity Database. 2001. Ongoing documentation of sensitive species distribution, biology, status, and references for the state of Wyoming. University of Wyoming, Laramie. USDA-Forest Service R2 Sensitive Species Evaluation Form Page 4 of 4 .
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