[Wikipedia] Range: It is endemic to northern California, where it can be found on hillsides in the San Francisco Bay Area and adjacent mountains and valleys. (link added by Mary Ann Machi)
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 05/12/2025).
