Leaf bud and stipule sometimes shortly fugaceous tomentose, otherwise entirely glabrous. Twigs 1.5-2 mm ø apically, slender, dotted with minute pale brown lenticels, smooth but for the prominent ribs above the lateral bundles of the petiole. Bud c. 4 by 1 mm, narrowly lanceolate. Stipule to 12 by 1 mm, narrowly lanceolate. Leaves 7-10 by 2-3.5 cm, lanceolate, thinly coriaceous, base cuneate, with revolute margin, acumen to 1 cm long, slender; margin frequently undulate; petiole c. 1 cm long, slender. Panicle to 6 cm long; terminal or axillary, ribbed and angular on drying, glabrous; simple or singly branched. Flower bud to 12 by 5 mm, fusiform, obtuse. Calyx glabrous; lobes subequal, lanceolate, obtuse. Corolla white; petals lanceolate, acute, glabrescent. Stamens c. 30, subequal, shorter than the style; filaments compressed, slender, tapering, united at base; anthers linear; appendage to connective short, hardly exceeding anther apex. Ovary small, ovoid, glabrous; style filiform, c. 3 times length of ovary, glabrous. Fruit calyx with to 2 cm ø, to 5 mm deep, shallow cup at base, impressed at the pedicel; with a shallow tubercle at the base of each calyx lobe; lobes to 9 by 2 cm, spatulate, equal, obtuse, tapering gradually to a 3-5 mm broad base. Nut to 2 cm long and Ø, ovoid to globose, glabrous, subacute.
An emergent tree in undisturbed, mixed dipterocarp forests, growing on hillsides and ridges with sandy soils; at elevations up to 400 metres. Found on fertile, clay-rich soils on basic, volcanics and calcareous shale; elevations up to 700 metres
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Widespread on fertile clay-rich soils, abundant on undulating land on basic volcanics and calcareous shale to 700 m.
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