Botanical name: Conyza sumatrensis Family: Asteraceae (Sunflower family)
Synonyms: Conyza floribunda, Erigeron albida
Tall Fleabane is an annual herb native to North America but naturalised worldwide. It is robust, erect, hairy herb, up to 2 m tall. Stems are unbranched or branched into an extended inflorescence, hairy with long spreading septate hairs. Leaves are hispid with short antrorse hairs. Basal leaves are lanceshaped to inverted-lanceshaped, 4-10 cm long, 5-12 mm wide, margins toothed. Upper leaves are lanceshaped to linear, entire. Inflorescence is an extended panicle with numerous flower-heads. Flower-heads are broad-bellshaped, 4-6 mm long, 6-10 mm in diameter. Involucral bracts are hairy, green with paler glabrous margins, inner surface reddish brown when reflexed. Florets are creamy, outer florets threadlike, inner florets few. Seed-pods are ovoid, sparsely hairy with thickened margins; pappus of many gold minutely barbellate bristles 3 mm long.
Identification credit: Gurcharan Singh
The flower labeled Tall Fleabane is ...