[Wikipedia] Range: Lasthenia coronaria is a species of flowering plant in the family Asteraceae known by the common name royal goldfields. It is native to California and Baja California, including Guadalupe Island. (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).