Parts of petals expanded in bud and ovary apex densely persistently buff puberulent, calyx at first frequently so, nerves beneath sparsely so or glabrescent, otherwise glabrous. Twig c. 4 by 2 mm ø apically, somewhat compressed, black. Buds to 20 by 5 mm, falcate-lanceolate, drying black; stipules to 12 by 1 cm, lorate-lanceolate, subacute. Leaves 9-16 by 5-10 cm, elliptic, subcoriaceous, prominently plicate; margin ± prominently crenate; base cuneate; acumen to 1 cm long, short; nerves 11-14 pairs, slender but prominent beneath, ascending; petioles 2.5-4 cm long, slender. Inflorescences to 10 cm long, axillary, bearing to 4 ± secund flowers. Flower buds to 3 by 1 cm, fusiform. Stamens 30, shorter than style at anthesis; filaments c. 1/2 length of anthers, long, broad and compressed at base, rapidly tapering and filiform above; anthers linear, somewhat tapering distally; appendage acicular, very slender, c. 2/3 length of anther. Ovary narrowly ovoid-lanceolate, tapering into the very long slender filiform style; gynoecium puberulent except for the distal 1/4; Fruit pedicel to 3 by 2 mm; calyx tube to 3 cm ø, subglobose smooth; 2 longer lobes to 22 by 3 cm, lorate-spatulate, usually obtuse, 3-nerved, c. 9 mm wide at base; 3 shorter lobes to 15 by 13 mm, suborbicular, subrevolute, prominent.
An upper canopy tree of mainly coastal undisturbed mixed dipterocarp forests at elevations up to 100 metres, where it is usually found on ridges. In secondary forests it is usually present as a pre-disturbance remnant tree.
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Lowland dipterocarp forests on well-drained but moist fertile red soils in valleys and on hillsides, sometimes on calcareous soil, even limestone (Java); sometimes gregarious; to 600 m.
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