Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Shoshonea - Shoshonea pulvinata

Species of Concern
Native Species

Global Rank: G3
State Rank: S2
(see State Rank Reason below)
State Threat Score: No Known Threats

Agency Status


External Links

State Rank Reason (see State Rank above)
Known in Montana only from the Pryor Mountains and the eastern slope of the Beartooth Plateau. Occurrences are located mostly on federal lands.
  • Details on Status Ranking and Review
    Shoshonea (Shoshonea pulvinata) Conservation Status Review
    Review Date = 06/27/2012
    View State Conservation Rank Criteria
    Population Size

    Score1 - Moderate: Generally 10,000-100,000 individuals.

    CommentAvailable data supports an estimated population size of slightly greater than 10,000 plants.

    Range Extent

    Score3 - Local Endemic or Very Small Montana Range: Generally restricted to an area <10,000 sq. miles (equivalent to the combined area of Phillips and Valley Counties) or <6 Sub-basins (4th code watersheds) Range-wide OR limited to one Sub-basin in Montana

    Area of Occupancy

    Score2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score1-2 - Moderate to High.


    Score0-2 - Stable to Moderate Declines:

    CommentMonitoring data from the 1990's generally showed stable to slightly declining trends, though increased mortality may have occurred since as a result of drought conditions.


    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score1-2 - Moderate to High Vulnerability.

    Raw Conservation Status Score

    Score 8 to 13 total points scored out of a possible 19.

General Description
Shoshonea is a low, mat-forming, herbaceous, long-lived perennial with a woody taproot and branching underground stems. The aboveground stems are 2-8 cm in length and usually clothed at their bases with remnants of the previous year's leaf sheaths. Leaves are ca. 5-25 mm long, 3-20 mm wide, and have a petiole that is ca. half their length. The leaf blades are oddly pinnate with 5-11 divisions and oblong to oval in outline. The leaf petioles are swollen and papery at their bases, and herbage is glabrous to somewhat roughened. The smallest flower clusters consist of a number of stalked flowers attached at a single point (simple umbels); these clusters are, in turn, stalked and attached at the top of the ovary. The fruits are approximately 2-4 mm long, slightly roughened to the touch, and without wings.

Flowering late June-July.

Diagnostic Characteristics
In open habitats, this species forms dense cushions and cannot be mistaken for any other member of the Parsley family in our area. In partially shaded sites, the cushion-forming habit is not so strongly expressed, and Shoshonea can be mistaken for species of Musineon, Cymopterus and Lomatium. The sessile flowers and persistent leaf bases are diagnostic. A technical key should be consulted to separate these groups.

Species Range
Montana Range Range Descriptions


Range Comments
Regional endemic to the Absaroka and Owl Creek Mountains of northwest Wyoming and adjacent Montana.

Observations in Montana Natural Heritage Program Database
Number of Observations: 59

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Open, exposed limestone outcrops, ridgetops, and canyon rims, in thin rocky soils.
Predicted Suitable Habitat Model

This species has a Predicted Suitable Habitat Model available.

To learn how these Models were created see

Ecological Systems Associated with this Species

Threats or Limiting Factors
Threat impact not assigned because threats are not known (MTNHP Threat Assessment 2021).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Clark, T.W., H.A. Harvey, R.D. Dorn, D.L. Genter, and C. Groves (eds). 1989. Rare, sensitive, and threatened species of the greater Yellowstone ecosystem. Northern Rockies Conservation Cooperative, Montana Natural Heritage Program, The Nature Conservancy, and Mountain West Environmental Services. 153 p.
    • Dorn, R.D. 1989. Report on the status of Shoshonea pulvinata, a candidate threatened species. Unpublished report. Mountain West Environmental Services, Cheyenne, WY. 32 pp.
    • Evert, E.F. and L. Constance. 1982. Shoshonea pulvinata, a new genus and species of Umbelliferae from Wyoming. Systematic Botany. 7:471-475.
    • Fertig, W. 1992. Sensitive plant species surveys and revised species checklist, Grass Creek Resource area, Bureau of Land Management. Wyoming Natural Diversity Database, The Nature Conservancy. 84 pp.
    • Heidel, B. 2001. Monitoring Shoshonea pulvinata in the Pryor and Beartooth Mountains, Carbon County, MT. 1999 trend report to Bureau of Land Management, MT. Montana Natural Heritage Program, Helena. 11 pp. plus appendices.
    • Lesica, P. 1992. Monitoring populations of Shoshonea pulvinata in the Pryor and Beartooth Mountains, Carbon County, Montana: 1992 progress report. Unpublished report prepared by the Montana Natural Heritage Program, Helena, MT.
    • Lesica, P. 1993. Monitoring populations of Shoshonea pulvinata in the Pryor and Beartooth mountains, Carbon County, Montana: 1991-1993 baseline report. Unpublished report prepared for the Bureau of Land Management, Miles City District. Montana Natural Heritage Program, Helena. 6 pp. plus appendices.
    • Lesica, P. and P.L. Achuff. 1991. Monitoring populations of Shoshonea pulvinata in the Pryor and Beartooth Mountains: 1991 establishment report. Unpublished report to the Montana State Office, Bureau of Land Management. Montana Natural Heritage Program, Helena, MT. 26 pp.
    • Lesica, P., K. Lackschewitz, J. Pierce, S. Gregory and M. O'Brien. 1986. Noteworthy collections: Montana. Madrono 33:310-312.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Lyman, J.C. 2005. Shoshonea pulvinata Evert & Constance (Shoshone carrot): a technical conservation assessment. USDA Forest Service, Rocky Mountain Region.
    • Marriott, H. 1992. Field survey for Claytonia lanceolata var. Flava, Cryptantha subcapitata and Shoshonea pulvinata in the Owl Creek and southeast Absaroka Mountains, Wyoming. [report prepared for BLM, Grass Creek Resource Area]. Wyoming Natural Diversity Database, The Nature Conservancy. 28 pp.
    • Pipp, A. 2016. Monitoring Shoshonea pulvinata in the Pryor and Beartooth Mountains, Carbon County, Montana: 1991-2015 Trend Report. Report for the Bureau of Land Management. Prepared by the Montana Natural Heritage Program. Helena, Montana. 29 pp + appendices
    • Shelly, J.S. 1988. Report on the conservation status of Shoshonea pulvinata, a candidate Threatened species. Unpublished report prepared for the U.S. Fish and Wildlife Service. 36 pp.
  • Web Search Engines for Articles on "Shoshonea"
Login Logout
Citation for data on this website:
Shoshonea — Shoshonea pulvinata.  Montana Field Guide.  .  Retrieved on , from