Calflora
Taxon  Report   5893    
Oenothera deltoides  Torr. & Frém.  ssp. howellii  (Munz) W. M. Klein
Antioch dunes evening primrose
Oenothera deltoides ssp. howellii
© Jo-Ann Ordano 2005 California Academy of Sciences
Photos from
CalPhotos / Calflora
Oenothera deltoides ssp. howellii
© 2013 Robert Sikora
Oenothera deltoides ssp. howellii
© 2004 John Game
Oenothera deltoides ssp. howellii, a dicot, is a perennial herb that is native to California, is endemic (limited) to California.
CNPS Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).   8th Edition

It is listed by the State of California as Endangered and by the Federal Government as 'Endangered '.

Interactive Distribution Map


Observation Hotline
(observation details + photos)



point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Oenothera deltoides ssp. howellii
© 2011 Zoya Akulova
Family: ONAGRACEAE  
Genus: Oenothera
Parent: Oenothera deltoides
Communities: Coastal Strand

Habitat: dunes

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
ICPN + PLANTS: Oenothera deltoides var. howellii
More information about  Oenothera deltoides ssp. howellii
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Landscaping information from Calscape
Photos on PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (OEDEH)

Search the International Plants Names Index

Search efloras.org (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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available: https://www.calflora.org/   (Accessed: Nov 14, 2018).

The information on this page comes from diverse sources. None of the links are sponsored.