ATTACHMENT SS2 REGION 2 SENSITIVE SPECIES EVALUATION FORM Species: Antennaria flagellaris / Stoloniferous Pussytoes Criteria Rank Rationale Literature Citations Stoloniferous Pussytoes is known from one area in Region 2, in the Absaroka Range • Dorn 2001 1 A of Shoshone National Forest, from the same general vicinity along the North Fork Distribution • Fertig 1998 within R2 Shoshone River drainage. It does not occur in other Region 2 states. • Fertig 2000a, b • Welp et al. 2000 This species inhabits seasonally wet basins, sagebrush meadows, and other open • Wyoming Natural Diversity areas (Bayer 1993). Wyoming populations occur at 7500-9900 feet. Its key habitat Database 2001 characteristics have not been delimited to characterize the pattern of habitat distribution, but the species’ distribution would seem to be patchy. Confidence in Rank High Stoloniferous Pussytoes is a western species that occurs from central Washington and • Cronquist 1955 2 B Oregon to northern California, Nevada, and southwest Idaho, with disjunct populations Distribution • Cronquist 1994 outside R2 in northwest Wyoming and western Montana. Wyoming populations occur in the • Fertig 2000a Absaroka Range and Yellowstone Plateau (Park and Teton counties). Only the former lies within Region 2. The other 3 extant occurrences in Wyoming and the 1 historical record (1885) are from Yellowstone National Park. The single known occurrence elsewhere in the Rocky Mountains on Lewis and Clark National Forest (Montana) was considered naturalized rather than native, possibly introduced by livestock (W. Phillips person. commun.). Confidence in Rank High Unknown. The achene is hairy. Long-distance dispersal may also be possible via • - 3 D vegetative reproduction if the fine stolons are fragile and broken off by passing wildlife. Dispersal Capability Confidence in Rank High The species is known from 6 extant occurrences in Wyoming. Half are in Region 2 on • Fertig 2000a 4 A Shoshone National Forest. There is also a historical occurrence outside Region 2. No Abundance in R2 population estimates have been made at any of the known sites. Individual populations may be limited in area and restricted to specialized microsites. Confidence in Rank Low USDA-Forest Service R2 Sensitive Species Evaluation Form Page 1 of 3 ATTACHMENT SS2 Species: Antennaria flagellaris / Stoloniferous Pussytoes 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 7 D Not known. • - Habitat Vulnerability or Confidence in Rank High Modification Stoloniferous Pussytoes is a short-lived herbaceous perennial that flowers in May-July, • Bayer and Stebbins 1993 8 D occasionally into August. Individual plants are unisexual. The three populations on Life History and Shoshone National Forest have been reported by the collector, Erwin Evert, as all Demographics staminate, or with both sexes present. It is not known whether reproduction is primarily apomictic or out-crossing. Additional information on the species, including life history stages, population structure, longevity, mortality, pollination biology and seed biology, are not available. Confidence in Rank High Initial Evaluator(s): Bonnie Heidel Date: 15 November 2001 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 3 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 Cimmaron NG Samuel R.McKelvie NF Black Hills NF Shoshone NF X White River NF Halsey NF Buffalo Gap NG Bighorn NF Routt NF Nebraska NF Ft. Pierre NG Black Hills NF Grand Mesa, Ogalala NG Medicine Bow NF Uncompahgre, Gunnison NF San Juan NF Thunder Basin NG Rio Grande NF Pike-San Isabel NF Comanche NG Literature cited Bayer, R.J. and G.L. Stebbins. 1993. A synopsis with keys for the genus Antennaria (Asteraceae: Inuleae: Gnaphaliinae) of North America. Canadian Journal of Botany 71: 1589-1604. Cronquist, A. 1955. Pt. 5. Compositae. In: Hitchcock, C.L., A. Cronquist, M. Ownbey, and J.W. Thompson (eds). Vascular Plants of the Pacific Northwest. Univ. Washington Publ. Biol. 17(5): 1-343. Cronquist, A. 1994. Intermountain Flora, Volume 5: Asterales. New York Botanical Garden, Bronx, New York. Dorn, R.D. 2001. Vascular Plants of Wyoming, third edition. Mountain West Publishing, Cheyenne, WY. 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. 2000a. State Species Abstract: Antennaria flagellaris. Wyoming Natural Diversity Database. Available on the internet at www.uwyo.edu/wyndd Fertig, W. 2000b. 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. 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. 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. USDA-Forest Service R2 Sensitive Species Evaluation Form Page 3 of 3 .