Poa atropurpurea

Known wet meadow habitats within the San Bernardino, Palomar and Laguna mountains in southern California. There are currently about 12 populations known extant. Only 2 sites, each with about 50 plants, are known in the Laguna Mountians; in the San Bernardino Mountains, most sites are small and the total area of available habitat remaining is estimated to be less that 40 ha. Extensive habitat was probably lost with the construction of a dam and reservoir in the late 1880s. Habitat has also been destroyed or degraded by recreational and airport development, livestock grazing and trampling, and the invasion of non-native plants. Much of the habitat is on unprotected lands subject to development within the next 15 years.

Between 12 and 18 populations (Stephenson and Calcarone 1999)

Over 70% of the populations occur on unprotected private lands in an area of growing human population. Even protected populations undergo activities that degrade the habitat including: mining, recreational use (including illegal ORV use), alterations of hydrology, and grazing. Long-term threats to the species include a low occurrence of male plants in some populations which contributes to low seed set (SCOPE MODERATE, SEVERITY LOW, IMMEDIACY HIGH, OVERALL F).