Common Name: common evening primroseScientific Name: Oenothera biennis L.Family Name: Onagraceae - Evening Primrose FamilyIdentification NotesLife Cyclenative biennial, reproducing by seed Stemsupright, second year, leafy, often purple or reddish, often branched above only Leavesfirst year basal leaves, elliptic to lanceolate, wavy margins, prominent white mid-vein, basal rosette; second year stem leaves, alternate, smaller with height, sessile Flowers4-petaled, bright yellow, stigma X-shaped, sepal turned down against stem; axillary and terminal above; long flowering period, flowers open late afternoon and evening Seed Pods capsule, upright, hairy