lanatus, Priority 1. Erigeron lanatus Hooker (ERLA). woolly fleabane, woolly daisy. CNHP G3G4 / S1, Track A FS: R2. -- G3G4 N3. CO S1, WY S1. GMUG-Taylor River-Cebolla, PSICC-Leadville, WR-Aspen Confi- Criteria Rank dence Rationale Sources of Information The localities as currently known occur in disjunct, isolated patches some distance Specimens at COLO and RM, Fertig 2001, from each other (see map below). However, the description of the rankings does not Dorn 2001, Weber and Wittmann 2001a, 1 really apply to this species. Harrington 1954. Distribution A M Ranked S1 in Colorado and S1 in Wyoming, not ranked in Montana. Other areas within R2 where E. lanatus might occur have not been checked very much, probably because of the scree slope habitat. The majority of the are in the Northern Rockies, in British Columbia, Alberta, Specimens at COLO and RM, Fertig 2001, 2 and adjacent northern Montana; there are two disjunct patches in Wyoming and Dorn 2001, Weber and Wittmann 2001a, Distribution B H Colorado. Harrington 1954. outside R2 Dispersal mechanisms unknown, although “It may be inferred that the bristly 3 pappus is appropriate for wind dispersal across unsuitable habitat” (Handley and Dispersal D H Laursen 2002). Capability Ranked “A” because species is rare with few occurrences, but “demographic Specimens at COLO and RM, Fertig 2001, 4 stochasticity” doesn’t apply to this . Dorn 2001, Weber and Wittmann 2001a, Abundance in A L Two occurrences in Wyoming and about 5 occurrences in Colorado; estimated 1000- Harrington 1954, my observations. R2 1400 individuals in Wyoming occurrences. Estimated 100 plants in one Colorado occurrence. 5 Populations appear to be stable at the Wyoming sites and one Colorado site. Fertig 2001, my observations. Population B H Trend in R2 In Wyoming, “restricted to thin patches of tan, pinkish, or reddish sandy soils and Weber and Wittmann 2001a, Fertig 2001, fine gravels among limestone boulders and talus on steep alpine slopes or rims. These my observations. 6 sites often have a rich cryptogamic crust component and very sparse vegetative cover Habitat Trend B M (often less than 5%)” (Fertig 2001). “Very local on alpine scree slopes” (Weber and in R2 Wittmann 2001a). These habitats appear to be stable both in Wyoming and Colorado, especially where they are on stable scree slopes. These scree slope habitats are expected to be highly resilient, even when they occur My observations, Fertig 2001. 7 close to a high-use trail, as at one site in Colorado. Most populations known are in Habitat C M wilderness areas. Vulnerability or Modification Details of life history and demographics unknown. 8 Life History and D H Demographics

National Forests in the Rocky Mountain Region where species is KNOWN (K) or LIKELY (L)* to occur: *. 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. COLORADO NF/NG K L K L K L Arapaho-Roosevelt NF NEBRASKA NF/NG WYOMING NF/NG White River NF Samuel R. McKelvie NF Shoshone NF Routt NF Halsey NF Bighorn NF Grand Mesa Uncompahgre Gunnison NF Nebraska NF Black Hills NF San Juan NF Ogalala NG Medicine Bow NF Rio Grande NF SOUTH DAKOTA NF/NG Thunder Basin NG Pike-San Isabel NF Black Hills NF KANSAS NF/NG Comanche NG Buffalo Gap NG Cimarron NG Pawnee NG Ft. Pierre NG

Taxonomy. Most Rocky Mountain botanists accept Erigeron lanatus as a species. Discussion. There are few populations in the Region, but they are apparently stable and the habitat is resilient; most populations occur in wilderness areas and are protected naturally by the habitat in any case. Erigeron lanatus does not appear to have viability concerns at this time in R2.

References Dorn, Robert D. 2001. Vascular plants of Wyoming, Third Edition. Cheyenne, WY: Mountain West Publishing, 412 pp. Fertig, Walter. 2001. State species abstract: Erigeron lanatus. Laramie, WY: Wyoming Natural Diversity Database, 3 pp. http://uwadmnweb.uwyo.edu/WYNDD. Handley, Joy; and Scott Laursen. 2002. Sensitive species evaluation: Erigeron lanatus. Attached below. Harrington, Harold D. 1954. Manual of the plants of Colorado: For the identification of the ferns and flowering plants of the state. Denver, CO: Sage Books. 666 pp. Hultén, Eric. 1968. Flora of Alaska and neighboring territories. Stanford, CA: Stanford University Press, 1008 pp. Rocky Mountain Herbarium. 1998. Atlas of the vascular plants of Wyoming. http://www.esb.utexas.edu/tchumley/wyomap/atlas.htm, accessed September, 2002. Spackman, Susan; Bill Jennings; Janet Coles; Carol Dawson; Mark Minton; Andrew Kratz; Carol Spurrier; Christopher S. Johnson; and Mike Barry. 1999. Colorado rare plant field guide. http://ndis.nrel.colostate.edu/ndis/rareplants/cover.html, last updated March 1, 1999. Weber, William A.; and Ronald C. Wittmann. 2000. Catalog of the Colorado flora: A biodiversity baseline. Boulder, CO: University of Colorado Museum. Revised March 11, 2000. http://www.colorado.edu/CUMUSEUM/research/botany/Catalog/Catalog.htm, downloaded September, 2002. Weber, William A.; and Ronald C. Wittmann. 2001a. Colorado flora: Western slope, Third Edition. Niwot, CO: Colorado Associated University Press. 488 pp. Weber, William A.; and Ronald C. Wittmann. 2001b. Colorado flora: Eastern Slope, Third Edition. Boulder, CO: University Press of Colorado. 521 pp.

Author and date: Barry C. Johnston, Botanist, Grand Mesa-Uncompahgre-Gunnison National Forests, 216 N. Colorado St., Gunnison, CO 81230-2197. (970) 642-4467. [email protected]. Last modified September 26, 2002. REGION 2 SENSITIVE SPECIES EVALUATION FORM

Species: Erigeron lanatus / Woolly Fleabane Criteria Rank Rationale Literature Citations Woolly Fleabane has not been found on any lands managed by Region 2 in Wyoming. However, • Colorado Native Plant Society 1 AD it occurs on the Pike-San Isabel, White River, and Grand Mesa, Uncompahgre, Gunnison 1997 Distribution within R2 national forests in Colorado, therefore, Colorado information is needed to determine its status in • Dorn 2001 Region 2. • Fertig 1994, 2000, 2001 Elsewhere in Wyoming, Woolly Fleabane is restricted to thin patches of tan, pinkish, or reddish • Fertig et al. 1994 sandy soils and fine gravels among limestone boulders and talus on steep alpine slopes or rims. • Spackman et al. 1997 These sites often have a rich cryptogamic crust component and very sparse vegetative cover • University of Wyoming 1998 (often less than 5%). Common associated species include Saussurea weberi, Erigeron • USDA Forest Service 2001 compositus, Polemonium viscosum, Senecio amplectens, Parrya nudicaulis, Smelowskia calycina, Claytonia megarrhiza, and Draba ventosa. Wyoming populations occur at elevations of 10,800-11,100 feet. These habitats are rare. Confidence in Rank Low Woolly Fleabane occurs from southern British Columbia and Alberta to northwestern Montana, • Colorado Native Plant Society 2 B with disjunct populations in west-central Wyoming and central Colorado. In Wyoming, Woolly 1997 Distribution outside R2 Fleabane is known from the northwestern Wind River Range in Sublette County. • Cronquist 1955 Confidence in Rank Low • Dorn 2001 • Fertig 1992a, b, c, 1999, 2000, 2001 • Fertig et al. 1994 • Fertig et al. 1991 • Scott 1997 • Spackman et al. 1997 It may be inferred that the bristly pappus is appropriate for wind dispersal across unsuitable • Cronquist 1947, 1955 3 D habitat. This species is well adapted to colonizing recently burned areas in early secondary Dispersal • Scott 1997 Capability succession. • USDA Forest Service 2002 Confidence in Rank High Woolly Fleabane is known from 2 extant occurrences in Wyoming, both discovered since 1990 • Fertig 1999, 2001 4 AD (most recently observed in 1994). Neither of these populations is on Region 2 lands. The Abundance in • NatureServe 2002 R2 population was estimated at 1000-1400 individuals in a survey by Walt Fertig in 1994. This • WYNDD 2002 species is ranked “S1” in Wyoming and “S1” in Colorado. Confidence in Rank High Populations appear to be stable based on observations from 1990-94. • Fertig 2001 5 D Confidence in Rank High Population Trend in R2 Trends are unknown but probably stable. • - 6 D Confidence in Rank High Habitat Trend in R2 Threats are minimal due to the ruggedness and low use of its habitat. Wyoming occurrences are • Fertig 1992a, b, c, 1999, 2000, 7 C all within the Bridger Wilderness on the Bridger-Teton National Forest. 2001 Habitat Vulnerability or Confidence in Rank Medium • Fertig et al. 1994 Modification • Fertig et al. 1991

Species: Erigeron lanatus / Woolly Fleabane Criteria Rank Rationale Literature Citations Woolly Fleabane is a perennial forb. Flowering and fruiting occur from July through August. • Cronquist 1947, 1955 8 D Additional information on the species, including life history stages, population structure, Life History and • Fertig 2001 Demographics longevity, mortality, and seed biology, are not available. • Scott 1997 Confidence in Rank High Initial Evaluator(s): Date: March 6, 2002 Joy Handley and Scott Laursen National Forests in the Rocky Mountain Region where species is KNOWN (K) or LIKELY(L)1 to occur:

Colorado NF/NG Kansas NF/NG Nebraska NF/NG South Dakota NF/NG Wyoming NF/NG

Likely Likely Known Known Known Likely Known Likely Known Likely Arapaho-Roosevelt NF Cimmaron NG Samuel R.McKelvie NF Black Hills NF Shoshone NF White River NF X Halsey NF Buffalo Gap NG Bighorn NF Routt NF Nebraska NF Ft. Pierre NG Black Hills NF Grand Mesa, Uncompahgre, Gunnison NF X Ogalala NG Medicine Bow NF San Juan NF Thunder Basin NG Rio Grande NF Pike-San Isabel NF X Comanche NG Literature cited Colorado Native Plant Society. 1997. Rare Plants of Colorado, second edition. Falcon Press Publ., Helena, MT. Cronquist, A. 1947. Revision of the North American species of Erigeron, north of Mexico. Brittonia 6 (2): 121-300. 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. Dorn, R.D. 2001. Vascular Plants of Wyoming, third edition. Mountain West Publishing, Cheyenne, WY. Fertig, W. 1992a. A floristic survey of the west slope of the Wind River Range, Wyoming. Unpublished Master's Thesis, University of Wyoming, Department of Botany. Fertig, W. 1992b. Checklist of the 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. 1992c. New additions to the flora of Wyoming. Wyoming Native Plant Society Newsletter 11 (2): 3-4. Fertig, W. 1994. Guide to Sensitive Wyoming plants of US Forest Service Region 2 (with emphasis on plants of Bighorn, Medicine Bow, and Shoshone National Forests). Unpublished report prepared as a handout for the TES species identification workshop conducted for US Forest Service Region 2 in Laramie, WY, 11 May 1994. Fertig, W. 1999. Sensitive plant surveys and status of rare plant species on Bridger-Teton National Forest, 1997-1998. Report prepared by the Wyoming Natural Diversity Database, Laramie, Wyoming. Fertig, W. 2000. 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. 2001. State Species Abstract: Erigeron lanatus. Wyoming Natural Diversity Database. Available on the internet at www.uwyo.edu/wyndd Fertig, W., C. Refsdal, and J. Whipple. 1994. Wyoming Rare Plant Field Guide. Wyoming Rare Plant Technical Committee, Cheyenne Wyoming. Fertig, W., R.L. Hartman, and B.E. Nelson. 1991. General floristic survey of the west slope of the Wind River Range, Bridger-Teton National Forest, 1990. Report prepared by the Rocky Mountain Herbarium, University of Wyoming, for the Bridger-Teton National Forest, 30 April 1991. Lesica, P. & J. S. Shelly. 1991. Sensitive, Threatened and Endangered Vascular Plants of Montana. Montana Natural Heritage Program, Occ. Publ. No. 1. Helena, MT. NatureServe. 2002. Explorer – an encyclopedia of life. Plant and animal data posted at www.natureserveexplorer.org, Arlington, VA. Scott, R.W. 1997. The Alpine Flora of the Rocky Mountains. Volume 1 The Middle Rockies. University of Utah Press, Salt Lake City, UT. Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado Rare Plant Field Guide. Prepared for the Bureau of Land Management, US Forest Service, and US Fish and Wildlife Service by the Colorado Natural Heritage Program, Ft. Collins, CO. 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. USDA Forest Service – Region 2. 2001. “Wyoming plant species” evaluation list and criteria provided to Wyoming Natural Diversity Database. Denver, CO. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (2002, February). Fire Effects Information System, [Online]. Available: http://www.fs.fed.us/database/feis/2002. Wyoming Natural Diversity Database. 2002. Ongoing documentation of sensitive species distribution, biology, status, and references for the state of Wyoming. University of Wyoming, Laramie.

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.