Taxon  Report   1674    
Castilleja ambigua  Hook. & Arn.  ssp. humboldtiensis  (D. D. Keck) T. I. Chuang & Heckard
Humboldt bay owl's clover
Castilleja ambigua ssp. humboldtiensis
© 2002 California Native Plant Society
Photos from
CalPhotos / Calflora
Castilleja ambigua ssp. humboldtiensis
© 2005 Doreen L. Smith
Castilleja ambigua ssp. humboldtiensis
© 2000 Doreen L. Smith
Castilleja ambigua ssp. humboldtiensis, a dicot, is an annual herb (hemiparasitic) that is native to California, is endemic (limited) to California.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Castilleja ambigua ssp. humboldtiensis
© 2005 Doreen L. Smith
Communities: Coastal Salt Marsh, wetland-riparian

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Habitat: salt-marsh, coastal

Name Status:
Accepted by JEF + PLANTS

CNPS accepted name:
Castilleja ambigua var. humboldtiensis

Alternate Names:
ICPN + PLANTS: Orthocarpus castillejoides var. humboldtiensis
More information about  Castilleja ambigua ssp. humboldtiensis
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

Search (Flora of North America)

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 22, 2019).