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 primrosePersonal use? Non-commercial use? Commercial use? Read the Fine Print. Comments? Tell me.