Tree up to 40(-55) m high and 84(-93) cm Ø. Bark cracked or fissured. Buttresses up to 1½ m high, 1¼ m extending outward from the trunk, and 15 cm thick. Leaves with (4-)7-12 pairs of leaflets; petiole, rachis and petiolules puberulous, sometimes glabrescent. Leaflets coriaceous, shining and glabrous above, sometimes puberulous or pubescent beneath, lanceolate, elliptic, or ovate-oblong, 3-17 (-28½) by 1¾-7½(-8) cm; base symmetric, cuneate or rounded; apex acuminate; nerves 15-20 pairs, slightly elevated or distinct below, visible above; veins reticulate, distinct or visible below, obscure above; petiolules grooved or the margins incurved above, lateral ones ⅓-¾ cm, terminal one up to 2¼ cm. Panicles up to 50 cm long, rusty-pubescent; branches up to 20 cm; bracts ovate, 2-3½ mm long, puberulous outside, sometimes also towards the base inside; pedicels (½-)1½-3 mm. Flowers white. Calyx 2¼-6 mm long, densely appressed-hairy on both surfaces; lobes triangular, unequal, ⅓-2 mm long. Petals oblanceolate, or narrowly oblong, 5-8 by 1-2 mm, sometimes sparsely hairy on the outer surface. Stamens 3½-4 mm, inserted in the grooves at the lower half of the disk; anthers ovoid, c. 1 mm long; sterile stamens in ♀ c. 2 mm. Disk pulvinate and 4-grooved, c. 1¼ mm Ø in ♂; fleshy and discoid, c. 2½ mm Ø in ♀. Ovary conical, c. 1½ mm Ø; style c. 1 mm; stigmas capitate. Drupe ovoid or broad-ellipsoid, l½-2½ by 1-1½ cm, apical part gradually narrowed into a beak; enlarged calyx pubescent on both surfaces, tube 1½-2¾ cm long, lobes (or wings, red when fresh) narrowly oblong, 6-10½(-16) by 1-1½ (-2¼) cm. Seed subglobose, ¾-1¼ cm Ø.
Dryland, also mixed dipterocarp forest, on inundated riverbanks and in freshwater swamp sometimes on limestone or ultrabasic soil, in the lowland, rarely higher, from 600-1450 m (Mt Kinabalu). Fl. fr. Jan.-Nov.
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