Known in CA from only five occurrences. On watch list in NV. See Contributions to Western Botany 12:11-12 (1908) for original description, and Memoirs of the New York Botanical Garden 13:686-688 (1964) 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
.