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Leaves imparipinnately compound, up to c. 14.5 x 8 cm., narrowly ovate in outline, with 3–5 pinnae on a narrowly-winged midrib, the midrib narrowly-winged petiole-like and auriculate below, denticulate or entire, glabrous or sparsely setose beneath; the terminal pinna ± sessile on the winged midrib, 2–5.5 x 1.3–3 cm., narrowly ovate, acute-acuminate above, cordate below; lateral pinnae subopposite, petiolules 1–10 mm. long and not or hardly winged, 2–4.5 x 0.8–2.6 cm., oblong-ovate, ± acute mucronate above and cuneate to cordate or asymmetric at the base.
Involucres c. 9 x 2 mm. and cylindric at time of flowering, increasing to c. 12 x 2.5 mm. and becoming conical in fruiting capitula; phyllaries c. 2–5 mm. long and broadly ovate on the outside, c. 12 mm. long and narrowly lanceolate on the inside, obtuse and ciliate above, glabrous.
Achenes pale-brown, up to c. 6 x 1.5 mm. including a c. 1.5 mm. long beak, narrowly ellipsoid, somewhat compressed with swollen ribs on the margins and 4–5 narrower wing-like ribs on each face, hispidulous; pappus several-seriate, of white barbellate setae c. 7 mm. long.
Synflorescences paniculate, axillary and terminal, mostly amongst the foliage; branches diffusely dichotomously subdivided, bracteate; bracts leaf-like ± oblanceolate denticulate auriculate.
Stems up to c. 5 m. long, slender terete, ± leafless and stramineous below, leafy and much entangled above, glabrous or rarely sparsely setulose.
Florets c. 5 per capitulum; corollas up to c. 14 mm. long, tube slender cylindric and pilose above, ligule yellow 6–8 x 1.5–2 mm., lorate.
Capitula numerous; stalks up to c. 2.5(4.5) cm. long with 1-several c. 2 mm. long ovate-lanceolate bracteoles.
A scandent diffuse short-lived perennial herb up to 2 m. high.
