Liana. Twigs usually glabrous, sometimes sparsely minutely pubescent; branchlets whitish yellow-brown, fairly smooth. Leaves elliptic-lanceolate to ovate-oblong, 5-12 by 3-6.5 cm, thin-chartaceous to coriaceous, glabrous, very glossy light yellow-green when dried, base cuneate to subcordate, slightly attenuate, apex gradually acuminate, more or less caudate, acute; 3-plinerved at the base, nerves near the margin, distinctly more faint than the midrib; petiole 0.5-1 cm. Inflorescences terminal and axillary, up to 10 cm long, laxly branched, many-flowered, sparsely minutely pubescent. Flowers (4-)5-merous. Calyx 1 mm, outside with some scattered hairs, inside glabrous, sepals ovate, blunt. Corolla 2-3 mm, halfway connate or somewhat less, outside thinly tomentose, inside about the mouth woolly or fully glabrous; lobes often strongly thickened. Stamens inserted in the mouth, anthers subsessile, ovate, 1/2-2/3 mm, minutely apiculate, glabrous or barbate. Pistil 1.5-2 mm, glabrous or the style slightly hairy. Fruits many, subglobular, c. 1.5-2 cm ø, smooth or slightly warty. Seeds 1 or 2, lenticular, 14-16 by 11.5 mm, thin.
Swampy forests, along streams, at low altitudes up to 1350 m. Fl. from March onwards, fr. Febr., Sept.
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