[Wikipedia] Rarity, Range, Subspecies: There are three subspecies. One, the San Bernardino Mountains bladderpod (subsp. bernardina), is a very rare plant known from only a few spots near Big Bear in the San Bernardino Mountains of southern California. Because of threats to the plant from mining and other human activities, this subspecies is treated as an endangered species on the federal level. (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).