*Ageratina adenophora (Spreng.) R.King & H.Rob.

Leaves rhomboidal, glandular hairy; blades almost as broad as long, hastate, serrate, conspicuously veined, up to 10 cm long, with long petioles. Cypselas glabrous. Perennial herb 1–2 m high. Widespread. Weed in moist places. Introd. from America. Fl. spring. Crofton Weed