Threatened by horticultural collecting, road construction, and geothermal development. See Contributions from the Dudley Herbarium 1:188 (1933) for original description, and Madroño 3(2):109 (1935) for taxonomic treatment.
California Counties and Islands:name (code) Lake (LAK), Napa (NAP), Sonoma (SON)
Quads:name (DWR code) USGS code Aetna Springs (516B) 38122F4, Detert Reservoir (517A) 38122F5, Mount St. Helena (517B) 38122F6
Definitions of codes preceding a county and/or quad:
Uncertain about distribution or identity
Uncertain about distribution, but presumed extirpated if once present
Occurrence confirmed, but possibly extirpated
Species may be present in other areas where conditions are favorable.
Quad data is not available for all List 3 and 4 plants. For those that do contain this data, it has not been quality controlled and is potentially incomplete, inaccurate, and/or out of date. Please use caution when referencing this information. We are currently working hard to maintain this data and hope to provide accurate and up to date information in the near future.