This recovery strategy addresses the recovery of Lyall's mariposa lily (Calochortus lyallii). In Canada, the species is found only in extreme south-central B.C. where it inhabits semi-arid, mid-elevation grasslands between the Okanagan Valley and Similkameen River (an area known as East Chopaka, mainly in what is now the South Okanagan Grasslands Protected Area). Over 90% of identified Lyall's mariposa lily habitat in Canada is currently regulated by the B.C. Park Act. Because of its highly localized distribution, potential threats from livestock grazing, and loss of habitat from forest encroachment (afforestation), the species was designated as Threatened by Committee on the Status of Endangered Wildlife in Canada (COSEWIC) in 2001. Currently, four factors pose potential ongoing threats to Lyall's mariposa lily. In approximate order of importance these are: encroachment by invasive alien plant species; livestock grazing; forest encroachment (secondary succession) and fire suppression; and, potentially, overcollecting by botanical enthusiasts.
Southern Interior Rare Plants Recovery Implementation Group. 2008. Recovery Strategy for Lyall's Mariposa Lily (Calochortus lyallii) in British Columbia. Ministry of Environment. BC Recovery Strategy (Species at Risk)
Topic: Recovery Planning
Keywords: sara, cosewic, species at risk, bc, species recovery, recovery planning
Scientific Name: Calochortus lyallii
English Name: Lyall's Mariposa Lily
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