Calochortus pulchellus is a perennial herb (bulb) that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
[Wikipedia] Description & Range: Calochortus pulchellus is endemic to California, where it is mainly restricted to Mount Diablo of the Diablo Range, in Contra Costa County of the eastern San Francisco Bay Area. There are historical occurrences in the North California Coast Ranges, within Marin, Solano, Napa, and Humboldt Counties.
It grows in chaparral and woodland habitats, currently only known on the bayside - western slopes of Mount Diablo. (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).
one or more occurrences