Tree or shrub, up to 2 m high. Branchlets smooth, greyish brown to greyish black; flowering twigs 2-6 mm thick. Leaves 2-4-jugate; petiole 4-12 cm long, terete to flattened above, sometimes ribbed, glabrous; rachis 4-34 cm long, angular, slightly winged below the jugae, ribbed, glabrous; petiolules 1-10 mm long, (slightly) grooved, glabrous, pulvinus 1-3 mm long, grooved, glabrous. Leaflets opposite to subopposite, ovate, 10-27 by 3-7 cm, index 3.2-4.5, papery to (thin) pergamen-taceous, both sides glabrous; base symmetric or slightly oblique, acute to attenuate; margin slightly recurved; apex usually abruptly narrowing but not very distinctly so, acute to cuspidate; midrib prominent, angular, lateral nerves 0.6-2 cm apart, almost perpendicular to the midrib towards the base, marginally distinctly looped, intercalated veins not distinctly curved towards the base, veins very densely reticulate, on the upper surface slightly raised. Inflorescences axillary, thyrsoid, not branching at the base, to 2.5 cm long, puberulous; bracts and bracteoles 0.5-1 mm long; pedicels 1-3 mm long. Flowers c. 5 mm in diam. Sepals: both sides glabrous, margin very laxly ciliate; outer ones broadly ovate, c. 2 by 1.5 mm; inner ones elliptic, c. 3 by 2 mm. Petals obovate, 2-3 by 1-2 mm, outside velutinous, proximally pubescent, inside glabrous; claw c. 1 mm high, both sides densely velutinous; margins lobed, slightly recurved towards the base, glabrous; apex obtuse; scales as folded margins of petal, lobed, 0.3-0.6 mm high, glabrous. Disc glabrous. Stamens 8; filaments c. 2 mm long, velutinous; anthers c. 1 mm long, laxly puberulous. Pistil immature; ovary sericeous; style and stigma not observed. Fruits obcordate, 1-1.5 by 1-1.2 cm, outside rugose, laxly puberulous, inside smooth, along the sutures densely setose; stipe 1-3 mm high; lobes 3, well developed, c. 6 by 5 mm; style not observed. Seeds not observed.
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