© Larry Norris
Annual, 1–28" (3–70 cm).
Flowers yellow or white, generally opening at dusk.
Blooming March–May.
Sandy or rocky slopes or washes.
Elevation –230–6550' (–70–2000 m).
Southwestern California, Great Basin Province, Desert Province.
Desert Wild Flowers (Oenothera clavaeformis) p. 173 174 # 375
A Flora of Southern California p. 596
The Jepson Manual p. 782 785
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