Dune Evening Primrose

Oenothera deltoides

Oenothera deltoides Photo © by Steve Ganley

Photographed by Steve Ganley in western Arizona. Feb. 2008. Growing together with sand verbena.

ANNUAL or PERENNIAL: Herbaceous annual or perennial growing well in response to heavy spring rains. Flowering stalks generally much less than a meter tall.

FLOWERS: Large snow-white petals fade to pink by late morning after remaining open through the night. Usual evening primrose formula of 4 sepals, 4 petals and 8 stamens. Blooms during hot months.

LEAVES: Before flowering, all the triangular leaves are clustered at ground level, in a rosette. They are silvery green.

RANGE: Restricted to deep sandy soil particularily on sand dunes of the western Sonoran Desert in Arizona and Mexico. Ranges across the southwestern United States.

FRUIT: Four sided capsule with many seeds is positioned well below the flower petals joined by a long collar, the hypanthium.

UNARMED. No spines/thorns.

Onagraceae -- Evening Primrose Family

Sponsored Links:

More Information:

Sonoran Desert Field Guide
Sonoran Desert Places
Sonoran Desert Naturalist Home Page


Copyright Michael J. Plagens, page created 21 March 2016