*Datura ferox L.

Prickles on the capsule stout, mostly more than 3 mm diam at the base, 10–15 mm long or longer. Corolla white, 2–3 cm diam. Leaves irregularly sinuate, ovate to oblong in outline. Robust herb up to 1.5 m high. Poisonous weed. Widespread. Weed of cultivation, stock yards and waste places. Introd. from America. Fl. summer–autumn