© Bill Ratcliffe
Annual or perennial, stems < 3' (1 m).
Flowers yellow or cream, open at dusk.
Blooming March–May.
Sandy washes, slopes, rocky walls, creosote-bush scrub.
Elevation < 1950' (600 m).
Desert Province.
Desert Wild Flowers (Oenothera cardiophylla) p. 176 175 # 378
A Flora of Southern California p. 595
The Jepson Manual p. 781 785
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