Oenothera glazioviana

Red sepaled evening primrose

Family: Onagraceae · Type: biennial · Not Native

Red sepaled evening primrose is a naturalized biennial found in northwestern, central western, and southwestern California in disturbed places at elevations below 500 meters. Flowering from June to September, this plant produces yellow flowers that fade to red-orange, with distinctive red-based sepals in spikes. Growing with erect stems 5 to 15 decimeters tall and densely covered in strigose hairs with long, spreading characteristics, it has a notably hairy appearance. Its cauline leaves are 5 to 15 centimeters long, elliptic to lanceolate, with crinkled edges that are dentate to nearly entire. The cylindric fruits are 20 to 35 millimeters long and nearly straight, carrying irregularly pitted seeds.

Habitat: Disturbed places

Bloom period: Jun-Sep

Elevation: < 500 m

Bioregions: NW, CW, SW

California counties: Alameda, Humboldt, San Luis Obispo, Mendocino, Del Norte, Santa Barbara, Sutter, Trinity, Los Angeles, San Mateo, Napa, Ventura, Marin

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