[Wikipedia] Flower Description: The inflorescence contains 10 to 20 reddish-purple, or occasionally white, flowers, each with very finely toothed tepals. (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).