Oenothera californica, known by the common name California evening primrose, is a species of flowering plant in the evening primrose family.

The plant is native to regions of southern and western California, the Southwestern United States, and Baja California, Mexico. It is found in desert and chaparral and woodlands habitats.

Desert ecoregions include the Mojave Desert, Sonoran Desert, and Great Basin Desert.

Chaparral and woodlands ecoregion locations include the southern California Coast Ranges, San Francisco Bay Area, Transverse Ranges, Channel Islands, and Peninsular Ranges.

Oenothera californica is a perennial herb producing a spreading or upright stem up to 80 centimeters (31 in) long. Young plants have a basal rosette of leaves, while older ones have leaves along the stem, lance-shaped to nearly oval in shape and up to 6 centimeters long.

Flowers occur in the upper leaf axils, drooping in bud and becoming erect as they bloom. The four petals are white, fading pink, and may exceed 3 centimeters long.

There are currently three subspecies of Oenothera California:

   Oenothera californica ssp. avita W.M.Klein 1962 — desert regions.
   Oenothera californica ssp. californica — eastern and Southern California
   Oenothera californica ssp. eurekensis (Munz & J.C.Roos) W.M.Klein 1962 — Eureka Dunes evening primrose.

Observations Map

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