*Lactuca saligna L.

Cauline leaves linear-lanceolate, entire, glabrous, stem-clasping; basal leaves pinnatisect, with few lobes, up to 20 cm long. Heads subsessile in the leaf axils. Involucre 3 mm diam. Cypselas glabrous, black, 2–3 mm long, with a beak 3–5 mm long. Pappus hairs 3–4 mm long. Glabrous herb up to 1 m high. Widespread. Weed of cultivation, pastures and waste places. Introd. from Europe; Asia and Africa. Fl. summer. Willow-leaved Lettuce