Calflora, a 501c3 non-profit
Distribution by County   5893    
Oenothera deltoides  Torr. & Frém.  ssp. howellii  (Munz) W. M. Klein
Antioch dunes evening primrose
Oenothera deltoides ssp. howellii is a perennial herb 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: Endangered. Federal status: Endangered.
Record Count by County

Contra Costa: 41 Sacramento: 3 Solano: 2

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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: 06/03/2023).