Common name: Tall Fleabane
Conyza sumatrensis (Retz.) E.Walker APNI*
Synonyms: Conyza albida Willd. ex Spreng. APNI*
Conyza floribunda Kunth APNI*
Description: Robust, erect annual herb to 2 m high, hispid; stems unbranched or branched into an extended inflorescence, hirsute with long spreading septate hairs.
Leaves hispid with short antrorse hairs; basal leaves lanceolate to oblanceolate, 4–10 cm long, 5–12 mm wide, margins toothed; upper leaves lanceolate to linear, entire.
Inflorescence an extended panicle with numerous heads; heads broad-campanulate, 4–6 mm long, 6–10 mm diam.; involucral bracts hirsute, green with paler glabrous margins, inner surface reddish brown when reflexed. Florets creamy; outer florets filiform; inner florets few.
Achenes ovoid, sparsely hairy with thickened margins; pappus of many gold minutely barbellate bristles 3 mm long.
Flowering: chiefly Dec.–Aug.
Distribution and occurrence: Weed of cultivation, pasture and wasteland; widespread, west to the Deniliquin area. Native of N Amer.
NSW subdivisions: *NC, *CC, *SC, *NT, *CT, *ST, *NWS, *CWS, *SWS, *SWP, *LHI
Other Australian states: *Qld *Vic. *W.A. *S.A.
Text by J. Everett
Taxon concept: P.S. Green (1994)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.