2014 John Game 2023 Ryan O'Dell 2012 Terrence Gosliner 2009 kevinhintsa
Cordylanthus nidularius is an annual herb (hemiparasitic) that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).
State of California status: Rare.
[Wikipedia] Distribution, Conservation: Cordylanthus nidularius is a rare species of flowering plant in the family Orobanchaceae known by the common name Mt. Diablo bird's beak.[2] Distribution: The plant is endemic to Mount Diablo, in the northern Diablo Range within Contra Costa County, in the East Bay region of northern California.[3] Conservation: This is a state and California Native Plant Society listed Critically endangered species. It is currently known from only one occurrence on Mt. Diablo, which is threatened by trail construction and recreation, and possibly by fire suppression.[4] (link added by Mary Ann Machi)
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Suggested Citation
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: 05/18/2025).