Common Name

Scientific Name

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Photo by Daniela Roth
Photo Courtesy of United States Fish and Wildlife Service

Frisco clover, Trifolium friscanum, a Federal candidate for listing, is known from a limited range in central Beaver and southwest Millard counties, Utah, i.e., San Francisco Mountains, Tunnel Spring Mountains, Blue Mountain and Beaver Lake Mountains. A member of the bean family, this species is a perennial herb that forms densely matted and depressed mounds. It has a many branched woody base, with persistent leaf bases, that gives rise to flowers with reddish-purple and pale petals that bloom in late May to June. Frisco clover grows in limestone and dolomite soils and gravels in sparsely vegetated pinyon-juniper woodlands at elevations ranging from 1720 to 2570 meters. It occurs at locations that are potentially subject to threats from mining and nonnative invasive plant species.


  • Barneby, R. C. 1989. Part B, Fabales. In: A. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal, and P. K. Holmgren. Intermountain Flora, Vascular Plants of the Intermountain West, U.S.A., Volume 3. New York Botanical Garden, Bronx, New York.

  • Kass, R. J. 1992. Status report on Trifolium andersonii var. friscanum. Unpublished report on file Utah Natural Heritage Program, Salt Lake City, Utah. 17 pp.

  • U.S. Fish and Wildlife Service (USFWS). 2011. Endangered and threatened wildlife and plants; 12-month finding on a petition to list Astragalus hamiltonii, Penstemon flowersii, Eriogonum soredium, Lepidium ostleri, and Trifolium friscanum as Endangered or Threatened. Notice of a 12–month petition finding. Dated February 23, 2011. Federal Register. 76(36): 10166-10203.