[Wikipedia] Range, Habitat: Vesper purpurascens, synonym Cymopterus purpurascens, is a species of flowering plant in the carrot family Apiaceae,[2] known by the common name widewing springparsley. It is native to much of the western United States, including the desert regions. (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).