Oenothera deltoides subsp. deltoides

Family: Onagraceae · Type: annual · Native

Evening primrose is a California native annual found in the Desert bioregion in sandy soils, including dunes, at elevations generally below 1,100 meters. Flowering from March to May, this plant produces yellow flowers with petals 15 to 43 millimeters long. Growing with branched stems 20 to 100 centimeters tall that have spreading hairs up to 1.5 millimeters long, it spreads widely across sandy landscapes. Its leaves become more dentate toward the stem tips, creating a distinctive green outline against the sandy habitat. The fruit develops with a base 2 to 3 millimeters wide, supporting the plant's annual reproductive cycle.

Habitat: Sandy soils, including dunes

Bloom period: Mar-May

Elevation: generally < 1100 m

Bioregions: D

California counties: Riverside, San Bernardino, Imperial, Los Angeles, San Diego, Kern, Inyo, Fresno

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.