Dwarf woolly-heads, specific populations, COSEWIC assessment status report: chapter 1
COSEWIC Assessment Summary
Assessment Summary – April 2006
Common name : Dwarf woolly-heads – Southern Mountain population
Scientific name : Psilocarphus brevissimus
Status : Endangered
Reason for designation : An annual herb restricted to a very small range and present at only three small sites on private lands within the COSEWIC Southern Mountain Ecological Area of British Columbia. Population size is subject to extreme fluctuations in the number of mature individuals due to variation in precipitation levels and the population is at risk from such factors as increased land development in the region and land use practices.
Occurrence : British Columbia
Status history : Designated Endangered in November 2003. Renamed dwarf woolly-heads (Southern Mountain population) in April 2006 and designated Endangered. Last assessment based on an update status report.
Assessment Summary – April 2006
Common name : Dwarf woolly-heads – Prairie population
Scientific name : Psilocarphus brevissimus
Status : Special Concern
Reason for designation : This population is widely distributed in Saskatchewan and Alberta at more than 40 sites with large among-year fluctuations in numbers of mature individuals and with concerns over potentially significant future impacts. These pertain to potential future development of coal-bed methane gas extraction in a significant part of the range of the population and disruptions from pipeline construction.
Occurrence : Alberta, Saskatchewan
Status history : Designated Special Concern in April 2006. Last assessment based on an update status report.
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