Tree up to 45 m tall, often with a considerable length of bole, to 90 cm diameter. Twigs ± densely short-strigose, occasionally villose-hirsute, glabrescent. Leaves 1-3 (-4)-jugate, rarely unifoliolate. Petiole 2-6(-7.5) cm, internodes of rachis 1-2.5(-4) cm, with tomentum as on twigs. Leaflets ovate to ovate-oblong, rarely obovate, 4-12(-16) by 2-5(-7) cm, apex acute or often slightly acuminate or rarely rounded, base acute to rounded or subcordate, slightly decurrent; margin serrate to subentire; secondary veins (7-)8-11 on either side of midrib; petiolule 8-20(-25) mm in terminal leaflets, 2-10 (-13) mm in lateral ones; blades above glabrous to sparsely short-hirsute, glabrescent, the venation slightly prominent, beneath sparsely and very shortly strigose or strigose-hirsute, or less commonly hirsute, the hairs up to 1.5 mm long, tomentum subpersistent. Stipules obovate to reniform, (5-)9-15 by (4-)7-18 mm, apex rounded or more often bifid with two obtuse apices, base distinctly stalked 2-4 mm long, tomentum as in leaflets. Inflorescences most commonly corymbiform, to thyrsiform, up to c. 25 by 25 cm, inserted at distal or subdistal nodes; branches glabrous to densely short-hirsute, rarely long hirsute. Flowers pedicellate, the pedicels 1-5 mm long. Sepals 1.7-2.8 by 1-2.1 mm, ± densely short-strigose or rarely fairly densely hirsute beneath. Petals ovate to oblong, 2.2-3.8 by 1.1-2 mm, sometimes with a central line of hairs on outer surface. Stamens with filaments 4.5-6.5 mm long and anthers 0.4-0.7 by 0.4-0.7 by 0.3 mm. Disc 0.3-0.6 mm high and thick. Ovary 1-2 by 1-1.4 mm, ± densely strigose or strigose-hirsute, each cell with 35-50 ovules; style 1.8-2.6 mm. Fruit with valves 4-8 mm long, 2.5-3.5 mm wide, containing many seeds. Seeds including wings 3.5-5 mm long, smooth.
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