[wikipedia] Range, Rarity: It is endemic to San Bernardino County, California, where it is known only from the Mojave Desert. It has been found in several locations in and around Barstow, often in gravelly, sandy habitat such as arroyos.
The historical range of the plant was wider than it is today; many occurrences have been extirpated.[5] The population sizes and abundance vary, as they probably depend on annual rainfall amounts.[6] (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: 03/28/2025).
one or more occurrences