Previously on List 3 due to lack of location, rarity, and endangerment information; location information still needed. Threatened by non-native plants, road and trail maintenance, vehicles, and alteration of fire regimes. Many collections lack tubers, which aid in identification. A synonym of C. californica in TJM 2. See American Journal of Botany 23:575 (1936) for original description, and Harvard Papers in Botany 4:43-48 (1993) for revised nomenclature.