Castilleja ambigua (Hook. & Arn.) T.I. Chuang & Heckard var. humboldtiensis (D.D. Keck) J.M. Egger
Humboldt bay owl's-clover
2023 Steve Conger 2022 Cynthia Adkisson 2017 Lucinda Adamson 2020 Mary Ann Machi 2017 Lucinda Adamson 2016 Taylor McCracken
Castilleja ambigua var. humboldtiensis is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
[explorer.natureserve.org] Threats, Endangered: Endemic to California, Castilleja ambigua ssp. humboldtiensis occurs in Humboldt, Mendocino, Marin, and Pacific Ocean Counties and is threatened by coastal development, cattle trampling, human recreational use, and ORV's. Only a few sites are protected and management plans may not exist. The coastal salt marsh habitat of this taxon is threatened in general. (contributed by Mary Ann Machi)
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2023 Steve Conger:!2022 Cynthia Adkisson:!2017 Lucinda Adamson:!2020 Mary Ann Machi:!2017 Lucinda Adamson:!2016 Taylor McCracken:!
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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]. 2024. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 04/24/2024).
one or more occurrences