[Wikipedia] Habitat, Bloom Period: Xanthisma spinulosum grows in dry, sandy hot openings, cooler woodlands, and can be found blooming in the spring, summer, or fall. (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).
