[Wikipedia] Distribution: Oenothera californica, known by the common name California evening primrose, is a species of flowering plant in the evening primrose family. Distribution 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. (link added by Mary Ann Machi)