Onagraceae

Stamens twice as many as the petals Onagraceae
Floral tube extending above the ovary. Sepals 4 Oenothera
Corolla yellow sometimes tinged bronze-red with age
Flowers more than 2 cm diam
Hairs on the stem below the inflorescence with swollen red bases. Leaves narrow-ovate to narrow-elliptic, up to 30 cm long at the base of the stem, pubescent. Flowers 5–7 cm diam. Capsule narrow-ovoid, 20–25 mm long, c. 8 mm diam., angular. Seeds angular. Erect herb up to 60 cm high. Mostly coast. On sandy soils. Introd. from America. Fl. summer–autumn Oenothera glazioviana
Hairs on the stem white to the base, scarcely swollen