Wyoming Ecological Services
Mountain-Prairie Region

Federally Listed, Proposed & Candidate Species | Species of Concern | Migratory Birds | All Species By County



Federally Listed, Proposed and Candidate Species


Fremont County Rockcress
(Boechera pusilla)

Staus: Candidate

Fremont County RockcressPhoto Credit: Bonnie Heidel, WYNDD


Fremont County Rockcress Section 7 Range

Section 7 Range Symbol

Wyoming Section 7 Range
Fremont County Rockcress

Potential Distribution in Wyoming

For Species Lists, please use the IPaC System

Section 7 Range

Under Section 7 of the Endangered Species Act of 1973, Federal agencies, or project proponents whose actions have a Federal nexus (e.g., Federal funding, permit, or lease), must consult with the U. S. Fish and Wildlife Service if their actions “may affect” listed species (endangered, threatened, proposed, candidate) or their habitat.  Section 7 species ranges identify those areas on the landscape where agencies or proponents should consider potential effects, both direct and indirect, to the species and their habitat.  These Section 7 species ranges typically encompass larger areas than specific locations where listed species are known to occur.  Project proponents are encouraged to refer to the Service’s Information, Planning, and Conservation System (IPAC) website at http://ecos.fws.gov/ipac/ or to contact the FWS Wyoming Ecological Services Office for additional information http://www.fws.gov/wyominges/ :307-772-2374.  (Section 7 Range boundaries based on the best available data at time of development.  Section 7 Ranges will be updated as new information becomes available.)

Download Section 7 Range GIS Data or Section 7 Range Google Earth layers


Species Information

Fremont County rockcress (Boechera pusilla)is a candidate for listing under the ESA (76 FR 33924; June 9, 2011).  This perennial herb has several long, slender stems that grow along the ground.  Its small, light lavender, four-petaled flowers blossom from May to mid-June.  Fremont County rockcress is endemic to sparsely vegetated, coarse, granitic soil pockets in exposed granite-pegmatite outcrops, with slopes generally less than 10 degrees.  The only known population of Fremont County rockcress is located at 8,000–8,100 feet in elevation on lands administered by the Bureau of Land Management in the southern foothills of the Wind River Range.  The primary threats to this species have not yet been fully identified.  However, threats appear to be acting on the species as evidenced by a recent decline in population size.  Threats to the species may be related to drought, disease, or other factors.  The Service does not maintain a list of "qualified" surveyors, but can refer those wishing to become familiar with Fremont County rockcress to experts who can provide training or services.

Recent Actions

- 12 Month Finding - Five Wyoming Plants

- 90 Day Finding - Five Wyoming Plants

Last updated: March 21, 2014