Shrub or tree to 18 m high and 50 cm Ø. Twigs glabrous, or sometimes the youngest parts appressedly pubescent. Leaves glabrous, except sometimes the very youngest, cuneate or rounded to acuminate, with cuneate base and entire, glandular crenulate to denticulate or serrate margin, elliptic to ovate or obovate, 5-22 by 1ll2-7 cm; nerves 4-13(-16) pairs, anastomosing or meeting in an intramarginal vein; petiole 2-10(-20) mm. Flowers in a short raceme, a 3-5-branched panicle of racemes or a spike of 1—3(—6 in Sumatra) cm, rarely only 1-3 flowers together; axis appressedly pubescent to minutely puberulous or nearly glabrous. Bracts and bracteoles caducous or persistent, with same indument as axis, ½-l½(-3) mm and slightly shorter than that respectively. Calyx with same indument as ovary or less hairy, ½-l (2ll2-3 in subsp. cumingiana var. pachyphylla) mm long. Corolla 2-5 mm. Stamens 20-60, but more than 75 in var. pachyphylla. Disk glabrous to shortly pilose, 5-glandular. Ovary mostly with same indument as inflorescence axis, or densely appressedly pubescent, rarely glabrous, c. 1½ mm high (2½ mm in var. pachyphylla); style glabrous to pilose, 3—5(—8) mm. Fruit ampulliform, with long neck, to ovoid, rarely ellipsoid or cylindrical; stone with coarse surface, low lengthwise ridges, or high, interrupted ridges and then with hollow base, filled with fleshy mesocarp. Seed 1, embryo obscurely S-shaped, curved with an angle of c. 90° ± halfway its length, or twice screw-like curved.
A sub-canopy tree in undisturbed mixed dipterocarp, sub-montane and montane forests; usually found on alluvial sites and on lower hillsides; growing in sandy to clay soils; at elevations up to 3,700 metres.
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