Oenothera biennis
Evening primrose

Family: Evening Primrose (Onagraceae)

Lifespan: Perennial

Height: 60-150 cm

Flower Color: Yellow

Flower Size: 2.5-5 cm wide

Bloom Season: June-September

Fruit: Oblong capsule about 2.5 cm long

Conditions: Waste ground, railroad ballast, open sand, and along roadsides

Sunlight: N/A

Moisture: N/A

The flowers of this night-flowering biennial open in the evening and close by noon.

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