Known in CA only from the vicinity of Susanville. Threatened by road maintenance and vehicles. Possibly threatened by logging and non-native plants. Potentially threatened by road construction and maintenance. See Contributions to Western Botany 8:37 (1898) for original description.
California Native Plant Society (CNPS).
Inventory of Rare and Endangered Plants (online edition, v8-01a).
California Native Plant Society. Sacramento, CA. Accessed on
.