[Wikipedia] Klamath Mtns Endemic: It is endemic to the Klamath Mountains of far northern California, where it is known from fewer than forty occurrences at Mount Eddy and other peaks in the range. (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: 04/03/2025).