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.
Conservation Status
Review Date2008-03-11
Change Date1984-02-07
Edition Date2008-03-11
Edition AuthorsK. Fayette (1998), rev. J. Bell (2008)
Rank Reasons
This species is known from eleven occurrences in Colorado and at least 20 in Utah (occurrence number from Utah not obtained but state rank is S3).
Range Extent Comments
Known from two counties in Colorado, six counties in Utah (Welsh et al. 1993) and Eureka County, Nevada. This species has been falsely reported from Wyoming (WYNHP 1998).
Occurrences Comments
There are eleven occurrences from two counties (Rio Blanco and Moffat) in Colorado. All of these occurrences have last observations of 1979-1983 (CNHP 1998). It is estimated that there are between 20-100 occurrences in Utah based on the state rank of S3.
Ecology & Habitat
Habitat
Barren or semibarren calciferous or gypsiferous outcrops of the Green River, Uinta, Ferron, Summerville, and Carmel formations in salt desert shrub, serviceberry, rabbitbrush, Indian rice-grass, greasebush, galleta, black sagebrush, pygmy sagebrush, and pinyon-juniper communities at 1705-2135 meters (Welsh et al. 1993).
Colorado Natural Heritage Program. 1998. Biological Conservation Datasystem. Colorado State University, Ft. Collins, CO.
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.
Utah Natural Heritage Program. May 1998. Element Occurrence Record Database, National Park subset. Salt Lake City, UT.
Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins (eds.) 1993. A Utah flora. 2nd edition. Brigham Young Univ., Provo, Utah. 986 pp.
Wyoming Natural Diversity Database. 1998. University of Wyoming, Laramie, WY.