• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Wildflowers - Pale Evening Primrose

Pale Evening Primrose - Oenothera albicaulis
Pale Evening Primrose - Oenothera albicaulis
NPS Photo by Jim Pisarowicz
 
Evening-Primrose's typically open in the evening when their nectaries attract night flying insects. The flowers may only last a day or so.

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