Tree (7-)25-40 m high, 37-45(-90) cm in diam.; usually with buttresses 0.3-3.2 m high, 40 cm wide and 4 cm thick, sometimes fissured or fluted. Leaves (7-)10-15-ju-gate; rachis 8.5-23 cm and petiole 0.5-1.1 cm, both rusty hairy. Leaflets sessile, oblong to lanceolate, 2.5-6 by 0.6-2 cm; apex obtuse but obliquely emarginate; base rounded or auriculate on the lower side; midrib very excentric, at 1-2.5 mm from the upper margin; usually glabrous, sometimes along the midrib sparsely hairy, nerves invisible on both surfaces. Inflorescences to 4.5(-8) cm long, 3.5(-8) cm wide; rachis 3-4.5 cm, densely hairy; bracts 0.4-4 cm long, densely rusty brown velvety hairy; bracteoles 7 mm; pedicels 1.5-3 cm, rather densely hairy. Flowers said to turn purple-brown very soon. Hypanthium 2-2.5 mm deep. Sepals 13-18 mm long, sparsely hairy. Petals 9-13 mm long. Stamens 30-32; filaments 13-18 mm, free or slightly connate for 0.75 mm at the base; anthers apiculate. Ovary densely hairy, the stipe c. 7 mm; style 5-7 mm; Fruits 2.7-4.3 by 1.4-1.5 by 1.5 cm, very sparsely hairy.
A canopy tree in primary lowland forest, sometimes in swampy localities or at riversides, both on alluvial clay and limestone; at elevations up to 650 metres.
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