*Conyza bilbaoana J.Remy

Involucral bracts glabrous, red-brown. Pappus yellowish-brown. 2–3 mm long. Heads numerous in panicles. Erect annual up to 2 m high, with glabrescent or sparsely hairy stems. Widespread. Weed of cultivation and waste places. Introd. from S. America. Fl. most of the year