[Wikipedia] Ecology: Of all of the endemic California plants, those of the family Asteraceae have the highest affinity for serpentine soils, based on the number of species represented in these serpentine plant communities.[12] Most serpentine endemism is concentrated in the North Coastal and Klamath Mountain Ranges of northwestern California and southwestern Oregon. (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: 03/29/2025).