[Wikipedia] Rarity, Range: It is endemic to California, where it is known fewer than twenty scattered occurrences in the Klamath Mountains and Cascade Range, and possibly the northern peaks of the High Sierra. (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: 03/30/2025).
one or more occurrences