This species is endemic to Colorado. This species is confined to a shale outcrop that is widely used for road gravel. This species is also on federal land, inlcuding BLM and Forest Service lands. Currently, it is known from only San Miguel and Dolores counties, and it is suspected that it won't be found much further than those counties, it is however, expected to be found at more sites within this range. Physaria pulvinata is threatened by over-grazing on Forest Service lands, ORV activities on BLM lands and removal of shale for road work (pers. comm. Jill Handwerk, Colorado Natural Heritage Program, O'Kane and Reveal 2006).
The primary threat is considered to be recreation, both motorized and non-motorized. This Physaria species is threatened by over-grazing on Forest Service lands, ORV activities on BLM lands and removal of shale for road work. There are only four known occ
There are 6 principal occurrences documented in the Colorado Natural Heritage Program database. Total estimated sum of individuals from documented occurrences is 22,000.
On both BLM and USFS Sensitive Species lists
There have been no studies of the demography and life history of this species.
Seed collection and storage.
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