Tree, 15-20 m high, dbh c. 45 cm, outer bark dark brown, inner bark orange brown, heartwood pinkish brown. Branchlets slightly rough, reddish brown with green dots to greyish black; flowering twigs 5-6.5 mm thick. Leaves 1-3-jugate, sometimes with a terminal leaflet; petiole 2.5-7 cm long, terete to flattened above, sometimes slightly winged below the lowermost pair of leaflets, slightly ribbed, glabrous; rachis 3.5-7 cm long, terete to angular, slightly winged below the jugae, slightly ribbed, glabrous; petiolule a pulvinus only, 5-13 mm long, grooved, glabrous. Leaflets opposite to suboppo-site, elliptic, 9.5-20 by 4-8.5 cm, index 2.1-2.8, pergamentaceous, both sides glabrous; base symmetric, usually acute, sometimes slightly attenuate; margin (slightly) recurved; apex acuminate; midrib prominent, slightly ribbed to smooth, lateral nerves 1-3.2 cm apart, sometimes slightly sunken above, basally indistinctly, apically distinctly looped, intercalated veins curved towards the base, veins laxly reticulate, on upper surface flattened to slightly raised. Inflorescences axillary, thyrsoid, branching at the base, to 3 cm long, densely puberulous; cymules 1-flowered; bracts and bracteoles to 1 mm long; pedicels 1-1.5 mm long. Flowers only seen in bud. Sepals glabrous on both sides, margin glabrous to very laxly ciliate, outer ones ovate, inner ones orbicular. Petals broadly elliptic, outside pilose only at the base, inside pilose towards the base; claw very short, glabrous; margins coarsely lobed, pilose towards the base; apex rounded; scales as folded margins of petal, thickened, velutinous. Disc glabrous. Stamens 8; filaments velutinous; anthers laxly puberulous. Pistil: ovary sericeous; style and stigma very immature. Fruits obcordate, 1.2-1.5 by 1.2-1.7 cm, outside rugose, very wrinkled, glabrous, inside densely papillose, stipe 2-3 mm high, lobes 1-3, well developed, 1.2-1.4 by 0.6-0.7 cm; style 0.5-1 mm long. Seeds ellipsoid to obovoid, 1-1.3 by 0.7-0.8 cm, sarcotesta covering the lower part of the seed; hilum 0.5-1 mm diam.; pseudohilum 1-1.2 cm diam.
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