NatureServe Conservation Status
Rounded Global Status Rank: G1 - Critically Imperiled
Reasons: Endemic to a narrow, discontinuous, 1.6 km-long ridgeline in southeastern Washington State. The population consists of about 5,000 individuals. Fire is a potential threat; the species does not appear to be fire adapted and the possibility (and intensity) of fire at this site is increasing due to cheat grass invation. A human-caused fire destroyed 10 to 20 percent of the population in 1996. Other potential threats include ORV use. The individual plants are long-persisting, and rarely reproduce from seed.
Environmental Specificity: Narrow. Specialist or community with key requirements common.
Comments: Known only from a single basalt ridgetop, growing in soil composed of basalt overlain with pumice (USFWS, 2004).