Liane 3–13 m. long; stems green to blackish purplish or reddish, glabrescent save for pubescent nodes; cork on old stems soft, shallowly fissured.. Leaves 5-foliolate or sometimes 3-foliolate on juvenile or flowering shoots; petioles terete, 5–12 cm. long, laxly pilose, glabrescent; petiolules channelled, 0.7–1.5(–3) cm. long, with similar indumentum; leaflets ovate, oblong-elliptic or obovate to lanceolate, 4–12.5 cm. long, 2.5–6 cm. wide, shortly acuminate at the apex, obtuse to subcordate at the base, rather thick, glabrous above, laxly pilose on nerves at base beneath; lateral nerves in 2–3 pairs in the lower third of the lamina.. Inflorescences with numerous greenish-white flowers; axes pubescent or tomentose; buds ellipsoid, ± 4 mm. long, subglabrous.. Outer tepals 5–7 mm. long, 5-nerved; inner shining white, linear, slightly shorter, 0.6–0.8 mm. wide; all minutely pilose inside and with setae up to 1 mm. long at the base.. Filaments with minute hooked hairs, setose beneath; appendages whitish, lanceolate, solid, 0.5–0.8 mm. long; anthers orange; interstaminal glands white, trapezoid.. Fruits 2.5–3.5 cm. long, puberulous, 2-winged; wings oblong, 3.5–4 cm. long, 4–5 cm. wide.. Fig. 2/1–9.
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