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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