Known in CA only from the southern Warner Mtns. See Pittonia 1:36 (1887) for original description, West Coast Botany, p. 63 (1898) by V. Rattan for revised nomenclature, and Annals of the Missouri Botanical Garden 11:281-283 (1924) and Systematic Botany Monographs 75:82 (2005) 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
.