Tree, up to 19 m high, dbh 2-25 cm, outer bark smooth, dark green to blackish brown, inner bark yellowish to ochre, thin. Branchlets rough to smooth, greenish brown to greyish black to reddish black; flowering twigs 3-6 mm thick. Leaves 1-4-jugate; petiole 2-11 cm long, slightly angular to terete, sometimes slightly winged below the lowermost pair of leaflets, (slightly) ribbed, glabrous; rachis 2.5-20 cm long, angular, slightly winged below the jugae, ribbed, glabrous; petiolule usually a pulvinus only, up to 10 mm long, slightly groove d, glabrous; pulvinus 2-5 mm long, grooved, glabrous. Leaflets usually subopposite, sometimes opposite, obovate to elliptic, 6-23 by 1-11 cm, index 2-3.7, coriaceous, both sides glabrous; base sometimes very slightly oblique but never distinctly so, acate to attenuate; margin (not) slightly re-curved; apex obtuse to distinctly acuminate, then alway: abruptly narrowing; midrib prominent, smooth to angular, lateral nerves 0.5-3 cm apart, basally indistinctly, apically distinctly looped, intercalated veins curved towards the base, veins laxly reticulate, on the upper side slightly raised. Inflorescences axillary, thyrsoid, branching at the base, to 19 cm long, laxly puberulous; cymules 1-flowered; bracts and bracteoles 0.5-1 mm long; pedicels 4-9 mm long. Flowers c. 7 mm in diam. Sepals: both sides glabrous, margin ciliate; outer ones broadly ovate, 3-2.5 by 2.5 mm; inner ones orbicular, 3.5-3 by 3 mm. Petals broadly obovate, c. 2.5 by 2 mm; outside pilose, inside laxly pilose; claw c. 0.8 mm high, both sides pilose; margins coarsely lobed, slightly thickened towards the base, densely pilose; apex rounded; scales absent. Disc glabrois. Stamens 8; filaments c. 3 mm long, ve-lutinoi s towards the base; anthers c. 0.5 mm long, puberulous. Ovary c. 1 mm high, densely sericeous; style c. 2 mm high, laxly puberulous. Fruits ob-cordatiî, attenuate at the base, 1.5-1.7 by 1.3-1.5 cm, outside rugose, very laxly puberulous, inside smooth; stipe slender, 5-7 mm high; lobes 1-3, well developed, 0.8-1 by 0.6-0.7 cm; style c. 0.5 mm long. Seeds not observed.
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