Liane or scandent shrub, 2–15 m. high; stems pale green or olive green, 4-lined or subterete and glabrous or slightly puberulous when young, becoming terete and reddish to purple-brown, with numerous lenticels varying in prominence. Leaf-lamina greyish-green to yellowish-green, sometimes ± shining above, concolorous, 3–10(20) × 2–5·5(10) cm., ovate to oblong or elliptic-oblong, rounded to obtuse or obtusely acuminate (rarely acutely acuminate) at the apex, with margin obtusely glandular-denticulate to entire, cuneate to rounded at the base, papyraceous to coriaceous, glabrous, with (5)6–8(9) lateral nerves and reticulate venation varying in density and prominence, equally prominent on both sides; petiole (2)3–7(10) mm. long, glabrous; stipules 1·5–2 mm. long, linear-lanceolate, entire, pubescent, deciduous, the opposite pairs not united but sometimes connected by ridges. Flowers 3–? in simple axillary dichasial sometimes corymbose cymes with pubescent or glabrescent branches; buds 2–7 mm. long, subglobose to elongate-conic; pedicels 1–6 mm. long, pubescent; bracts 0·5–1 mm. long, triangular, acute, entire, pubescent, persistent. Sepals greenish, pubescent, convex, sometimes rugose outside, c. 1 mm. long, subequal, ovate-triangular, obtuse or rounded, free. Petals greenish, 3–6 mm. long, lanceolate-triangular, acute or subacute, often with subapical cusp, plane or with ± undulate margin, wholly glabrous or puberulous outside, slightly imbricate in bud. Disk single, ± undulate or 5-lobed, concave (free or united to the petals) or ± convex (i.e. surrounding the ovary) with or without a free margin. Stamens 3, with filaments broad or narrow at the base, glabrous; anthers extrorse, circular, 2-thecous, with orange-red pollen. Ovary glabrous, with style elongated, glabrous; stigmas united; ovules 6–14 per loculus. Mericarps green or brownish-green, 3·5–5·5 × 2·3–3·9 cm., oblong or elliptic to oblanceolate or obovate, rounded or retuse at the apex, glabrous, 6–14-seeded, striate or smooth. Seeds winged, with veins marginal and intramarginal to submedian, the thickened marginal one surrounding the embryo or not.
