Erigeron allocotus - Blake
Branched Fleabane
Taxonomic Status: Accepted
Related ITIS Name(s): Erigeron allocotus S.F. Blake (TSN 35816)
Unique Identifier: ELEMENT_GLOBAL.2.151720
Element Code: PDAST3M050
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Erigeron
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Erigeron allocotus
Taxonomic Comments: Distinct species.
Conservation Status
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NatureServe Status

Global Status: G3
Global Status Last Reviewed: 06Feb1990
Global Status Last Changed: 06Feb1990
Rounded Global Status: G3 - Vulnerable
Reasons: Number of sites (known to be conservative), large population s, no known threats.
Nation: United States
National Status: N3

U.S. & Canada State/Province Status
United States Montana (S3), Wyoming (S2S3)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Regional endemic of the Bighorn and Pryor ranges and adjacent foothills in north-central Wyoming and south-central Montana.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: 18 documented sites. Very likely there are more (much unsur veyed potential habitat).

Population Size Comments: Abundant where it occurs.

Overall Threat Impact Comments: Much of known habitat is very inaccessible. No documented t hreats.

Intrinsic Vulnerability Comments: Unknown, but probably not very fragile--grows in xeric habit ats with poor soils.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Regional endemic of the Bighorn and Pryor ranges and adjacent foothills in north-central Wyoming and south-central Montana.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States MT, WY

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
MT Big Horn (30003), Carbon (30009)
WY Big Horn (56003), Sheridan (56033), Washakie (56043)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Nowood (10080008)+, Big Horn Lake (10080010)+, Little Bighorn (10080016)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Bighorn fleabane is a multi-branched perennial herb with leafy stems 13-18 cm tall. Stems and leaves are conspicuously pubescent with coarse, spreading hairs. The leaves may also be finely glandular and are divided at the tip into 3-5 teeth or linear segments. Basal leaves are 1.5-3 cm long, while stem leaves are mostly under 1 cm and simple to 3-toothed. Flowering heads are small and numerous, each having a 4-5 mm high involucre of glandular and hirsute bracts, 25-40 white to pinkish ray flowers (3-6 mm long), and a yellow-flowered disk 6-9 mm wide (disk corollas 2-3.5 mm long). The pappus consists of 12-20 bristles 2-2.5 mm long. Fruits are 2-nerved achenes with short stiff hairs (Dorn 1992, Cronquist 1947, Blake 1937; Marriott and Jones 1989). [from Heidel and Fertig 2000]
Habitat Comments: Rocky calcareous sites.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 17Oct1989
NatureServe Conservation Status Factors Author: MARRIOTT, H.

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
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  • Andersen, M.D. and B. Heidel. 2011. HUC-based species range maps. Prepared by Wyoming Natural Diversity Database for use in the pilot WISDOM application operational from inception to yet-to-be-determined date of update of tool.

  • Beauvais, G.P., W. Fertig, and G.P. Jones. 2000. Rare species and the vegetation of Washakie County, Wyoming. Report prepared for the Washakie County planner by the Wyoming Natural Diversity Database, Laramie, WY.

  • Blake, S.F. 1937. New Asteraceae. Journal Washington Acad. Sciences. 27:379-380.

  • Clark, T. W. and R. D. Dorn. 1979. Rare and endangered vascular plants and vertebrates of Wyoming. Published by the authors.

  • Clark, T.W., and R.D. Dorn. 1979. Rare and endangered vascular plants and vertebrates of Wyoming. Published by the authors. 78 pp.

  • Cronquist, A. 1947. Revision of the North American species of Erigeron, north of Mexico. Brittonia 6:121-300.

  • Dorn, R. D. 1992. Vascular Plants of Wyoming, second edition. Mountain West Publishing, Cheyenne, WY.

  • Dorn, R. D. 2001. Vascular Plants of Wyoming, third edition. Mountain West Publishing, Cheyenne, WY.

  • Dorn, R.D. 1992. Vascular plants of Wyoming, 2nd edition. Mountain West Publishing, Cheyenne, Wyoming.

  • Evert, E. F. 2010. Vascular Plants of the Greater Yellowstone Area: Annotated Catalog and Atlas. Park Ridge, IL.

  • Fertig, W. 2000. State Species Abstract: Erigeron allocotus. Wyoming Natural Diversity Database. Available on the internet at www.uwyo.edu/wyndd.

  • 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. 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.

  • Heidel, B. and W. Fertig. 2000. Rare plants of Bighorn Canyon National Recreation Area. Report to the National Fish and Wildlife Foundation and Bighorn Canyon National Recreation Area, National Park Service. Montana Natural Heritage Program and Wyoming Natural Diversity Database. Helena and Laramie. 63 pp. plus appendices.

  • Heidel, B. and W. Fertig. 2000. Rare plants of Bighorn Canyon National Recreation Area. Unpublished report prepared for National Fish and Wildlife Foundation and Bighorn Canyon National Recreation Area, National Park Service by the Montana Natural Heritage Program and Wyoming Natural Diversity Database.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Keenlyne, K.D. 1977. Special Report Number 3: Endangered or Threatened Species in Wyoming. US Fish and Wildlife Service, Casper, WY. 48 pp.

  • Lesica, P. & J. S. Shelly. 1991. Sensitive, Threatened and Endangered Vascular Plants of Montana. Montana Natural Heritage Program, Occ. Publ. No. 1. Helena, MT.

  • Lesica, P. and P.L. Achuff. 1992. Distribution of Vascular Plant Species of Special Concern and Limited Distribution in the Pryor Mountain Desert, Carbon County, Montana. Unpublished report prepared for the USDI Bureau of Land Management by the Montana Natural Heritage Program, Helena, Montana, January 1992. 44 pp.

  • Marriott, H. J. and G. P. Jones. 1989. Special status plant surveys and plant community surveys in the Trapper Creek and Medicine Lodge Wilderness Study Areas and the Spanish Point Karst ACEC. Unpublished report submitted to the Bureau of Land Management, Worland District Office, by the Wyoming Natural Diversity Database, Laramie, WY.

  • Marriott, H. J., and G. P. Jones. 1989. Special status plant surveys and plant community surveys in the Trapper Creek and Medicine Lodge Wilderness Study Areas and the Spanish Point Karst ACEC. Report submitted to the Bureau of Land Management, Worland District Office, under Cooperative Agreement Task Order No. WY910-CA9-001TQE1. Wyoming Natural Diversity Database, Laramie. 42 pp. plus appendices.

  • Nesom, G. L. 2006. Erigeron. Pages 256-348 in Flora of North America Editorial Committee, editor. Flora of North America North of Mexico. Vol. 20. Magnoliophyta: Asteridae (in part): Asteraceae part 2. Oxford University Press, New York, NY.

  • Teton Science School. 1994. Erigeron allocotus study: Tensleep Preserve, WY. Unpublished report prepared for the Wyoming Field Office, The Nature Conservancy. 8 pp.

  • Welp, L., W. Fertig, and G. Jones. 1998. Ecological evaluation of the potential Dry Fork Research Natural Area within the Bighorn National Forest, Sheridan County, Wyoming. Unpublished report prepared for the Bighorn National Forest by the Wyoming Natural Diversity Database, Laramie, WY.

  • Welp, L., W. Fertig, and G. Jones. 1998. Ecological evaluation of the potential Elephant Head Research Natural Area within the Bighorn National Forest, Big Horn County, Wyoming. Unpublished report prepared for the Bighorn National Forest by the Wyoming Natural Diversity Database, Laramie, WY.

  • Welp, L., W. Fertig, and G. Jones. 1998. Ecological evaluation of the potential Tensleep Canyon Research Natural Area within the Bighorn National Forest, Washakie County, Wyoming. Unpublished report prepared for the Bighorn National Forest by the Wyoming Natural Diversity Database, Laramie, WY.

  • 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.

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