Ancistrocarphus keilii is an annual herb that is native to California.
California Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).
[Wikipedia] Threats: The plant is considered to be vulnerable to extinction because of its rarity, its populations are located in habitat that is likely to be disturbed or developed, and because it apparently has no effective method of biological dispersal. (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: 03/31/2025).
one or more occurrences