Threatened by development. Possibly threatened by foot traffic. See Erythea 1:6 (1893) for original description, and University of California Publications in Botany 25:71-72 (1951) for taxonomic treatment.
California Native Plant Society (CNPS).
Inventory of Rare and Endangered Plants (online edition, v8-01a).
California Native Plant Society. Sacramento, CA. Accessed on
.