Evening Primrose
Evening Primrose, a family and a genus of annual, biennial, and perennial plants native chiefly to North and Central America. The flowers of many species open at sunset and close in the morning. Several species are grown in gardens. The common evening primrose is native to the region from Labrador to Florida, westward to the Rockies. It grows about six feet (1.8 m) high and bears yellow, cup-shaped, four-petaled flowers. The roots of the common evening primrose are eaten as a vegetable, and the shoots in salads. Oil derived from its seeds is used in pharmaceuticals and skin-care products.
Evening primroses form the genus Oenothera of the family Onagraceae. The common evening primrose is O. biennis.