Tree to 33 m tall; bole to 70 cm diam.; buttresses to 1 m tall and 60 cm out. Bark superficially cracked, brown with star-shaped pustulate lenticels; inner bark pinkish; sapwood straw; heartwood pale reddish brown. Leafy twigs c. 7 mm diam.; apical bud stiletto-like. Leaves to 48 cm long, spirally arranged, 3–5-jugate, glabrous; petiole 8– 13 cm, flattened adaxially, swollen and often blackish (when dried) at base. Leaflets 7.5–13 by 3.4–4.7 cm, narrowly elliptic-ovate, subcoriaceous, subopposite, often shiny adaxially, bases rounded to subcuneate, ± asymmetric, apices acuminate, costae c. 13–19 on each side, indistinct, subsquarrose and spreading, inarched only near margin but: not looped; petiolules 3–4(–9) mm, blackened at base when dried. Thyrses 5– 10 cm, subspiciform with fascicles of 1 or a few sessile flowers; bracts c. 0.5 mm, triangular. Calyx c. 2.5 mm diam., almost flat, puberulent without, confluent with pseudo pedicel c. 1 mm long, margin deeply 4-lobed. Petals 4, c. 7 mm long, creamy yellow, subglabrous to puberulent without. Staminal tube thick, tough, weakly pilose distally, margin crenate; anthers 8, ovate, included. Disk shortly cupuliform, glabrous, fleshy. Ovary pubescent, 4-locular, each locule with 2 collateral ovules; style pubescent in proximal half; stylehead discoid. Capsule dit least 4 cm diam., depressed-globose, weakly stipitate, reddish orange. Seed (Corner, l.c.) brown to black with small arilloid hilum on one side, seedcoat apparently largely pachychalazal; cotyledons green.
A mid-canopy tree in undisturbed mixed dipterocarp forests, growing on hillsides with sandy soils; at elevations up to 100 metres. Rain forests at elevations to 1,700 metres.
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