Taxon  Report   5901    
Oenothera longissima  Rydb.
Long evening primrose,  Longstem evening primrose
Oenothera longissima
© 2011 Ron Wolf
Photos from
CalPhotos / Calflora
Oenothera longissima, a dicot, is a perennial herb that is native to California, is also found outside of California, but is confined to western North America.
CNPS Rare Plant Rank: 2B.2 (rare, threatened, or endangered in CA; common elsewhere).   8th Edition

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Oenothera longissima
© 2011 Ron Wolf
Genus: Oenothera
Communities: Creosote Bush Scrub, Pinyon-Juniper Woodland, wetland-riparian

Wetlands: Occurs in wetlands

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
PLANTS: Oenothera longissima ssp. typica
PLANTS: Oenothera longissima var. clutei
ICPN + PLANTS: Oenothera longissima ssp. clutei
More information about  Oenothera longissima
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 21, 2019).