[Wildflowers with Four Petals in the Desert Southwest of the United States]

The Evening-primrose Family in the Mountains and Deserts of the American Southwest

Onagraceae

Fragrant Evening-primrose: Oenothera cespitosa ssp. marginata

Fragrant Evening-primrose: Oenothera cespitosa ssp. marginata

Evening-primroses, Sun Cups and Yellow Cups: The Genus Camissonia (updated to the genera Chylismia and Eremothera)

Sun Cups: The Genus Camissoniopsis

California Primrose, California Suncup: Eulobus californicus (Synonyms: Camissonia californica, Oenothera leptocarpa)

Evening-primroses: The Genus Oenothera

Paul Slichter Mail