Evil-smelling climbing shrub to 3.6 m. long; stems pubescent to velvety hairy with brownish or purplish hairs when young, later ridged and pubescent.. Leaves opposite or in whorls of 3; blades elliptic, oblong or ovate, 2–10(–18.3) cm. long, 0.9–6.3(–13) cm. wide, acuminate at the apex, rounded to cordate at the base, pubescent with curled adpressed hairs above, densely velvety-tomentose beneath or pubescent only on the nerves; petiole 0.4–11 cm. long, pubescent to velvety pubescent; stipules ovate-oblong to triangular-acuminate, 4–10 mm. long, 2–4 mm. wide, sometimes slightly divided at the extreme tip.. Inflorescences condensed axillary panicles or sometimes terminal at the ends of axillary branches and, in some cases where the leaves are suppressed, forming a compound raceme of panicles up to 21 cm. long in the fruiting state; peduncle 1–4(–10.5) cm. long, brownish or purplish velvety pubescent; pedicels 0.5–0.9 mm. long.. Calyx-tube ovoid, 1.5–2 mm. long, densely pubescent; lobes 5, subulate, 3–7 mm. long, curved at the tips, densely pubescent.. Corolla white or greenish yellow, ± pubescent or glabrescent outside; tube 0.75–1.2 cm. long; lobes 5, oblong-lanceolate, 2.5–6 mm. long, 1–2.2 mm. wide, hairy inside at least near throat, margined.. Anthers exserted.. Style 8 mm. long; stigma-lobes 6.5 mm. long.. Fruit elliptic in plan, very compressed, 1.1–1.4 cm. long, 0.85–1.2 cm. wide, ± 1.5–2 mm. thick; pericarp straw-coloured, pubescent; pyrenes elliptic, 0.9–1.2 cm. long, 7–9 mm. wide, with many rhaphides on the surface, the marginal wing 1.1–3(–5 at end) mm. wide; nerves prominent on the outer surface, the main detached rib 1.1 cm. long.. Seed black, 4–6.5 mm. long, 4–5.5 mm. wide.
In scrub, woodland or forest, often riverine, at elevations of 50-1,100 metres.
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