*Conyza bonariensis (L.) Cronq.

Pappus white or pink, c. 3 mm long. Involucral bracts pale inside. Heads numerous in a pyramidal or corymb-like panicle. Erect perennial up to c. 1 m high. Widespread. Weed of cultivation and waste places. Introd. from N. America. Fl. most of the year. Flaxleaf Fleabane