Yellow Flowers
COMMON EVENING PRIMROSE
(Oenothera biennis)
Small Flowering Plants

Family: Primrose family

Location: Dry open places

Season: Summer and fall

Flower: Four yellow petals surrounding many stamens and a single cross shaped stigma.  Flower 1-2" wide.  Opens in the evening and closes by mid morning the next day.  Held in loose terminal clusters.

Leaves: Alternate, lance-shaped, wavy-edged, slightly toothed.

Other Facts: 1'-6' high