Trees up to 35 m tall, the bole to 27 m by 60 cm diameter, often with small buttresses, the bark exuding a red sap slowly turning colourless. Twigs glabrous. Leaves trifoliolate, petiolate; petiole 1-5 cm, terete, channelled above; leaflets obovate-oblong or oblong to ovate-lanceolate or lanceolate, (3.5-)5.5-13(-26) by (1-)2-6(-10) cm, acute to obtuse or rounded at apex, acute and decurrent at base, the margin faintly serrate to entire; secondary veins 25-35 of varying thickness on each side of midrib; petiolule (1-)3-15 mm; leaf glabrous except sometimes lower part of petiole sparsely strigose. Stipules triangular-ovate, 3-13 by 2.5-6 mm, usually early caducous. Inflorescences terminal, often with adjoining axillary ones, many-flowered, up to c. 30 by 20 cm, sometimes with one or more pairs of reduced leaves at subdistal nodes, sometimes 1 or 2 additional collateral or serial branches at lowest nodes; branches with persistent short pubescence increasing in density towards ultimate branchlets, with small distinctly less hairy ± caducous bracts. Flowers 4(-5)-merous, apetalous, with short hirsute pedicel 0.5 mm thick, articulating at base of hypanthium or up to 1 mm below it. Hypanthium conical, 0.8-1.2 mm tall, 1.7-2 mm diameter, strigose-hirsute. Calyx lobes ovate to lanceolate, 2.6-3.2 by 1.8-2.5 mm, acute, strigose beneath, sparsely so towards apex, ± densely hirsute above; stamens with filaments 0.9-1.8 mm long, at base 0.2-0.3 mm wide; anthers bluntly acuminate with extended connective at most 0.1 mm long, incised at base, 0.3-0.5 by 0.3-0.5 by 0.15-0.2 mm. Disc 0.3-0.5 mm tall, 0.3-0.5 mm wide, glabrous, fairly thick-fleshy, slightly indented. Superior part of ovary 0.5-0.8 by 0.7-1 mm, ± densely hirsute; styles 0.8-1.8 mm, glabrous. Fruit with ovary c. 5 by 3 mm, the styles up to 3 mm long, and the sepals enlarged up to 15 by 5 mm.
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