Photo: Camissonia.

Flowering plant This is not "the" evening primrose (Oenothera biennis). The Camissonias have a ball in the center of the flower, where Oenotheras have a cross. Picacho, CA, US. Wild. 1998-03-01.
Camissonia Link Engl.: suncup, evening primrose
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Photo: Camissonia.