Medium-sized tree with flaky bark, thin buttresses and sometimes a few stilt roots. Young twig and domatia grey-brown puberulent, glabrescent; petiole, leaf bud and stipule persistently so. Twig c. 1 mm ø apically, slender, much branched, terete, smooth; stipule scars short, obscure. Bud to 1 by 1 mm, ellipsoid, obtuse, minute. Stipule small, linear, fugaceous. Leaves 4-9 by 1-3.5 cm, ovate-lanceolate, base cuneate; acumen to 1.5 cm long, subcaudate, slender; nervation dryobalanoid, main nerves c. 8-12 pairs, with subequal secondaries, indistinct, slender, hardly raised; midrib raised on both surfaces; petiole 6-8 mm long. Panicle to 2 cm long, terminal or axillary, terete, caducous puberulent; singly branched. Calyx glabrous, 2 outer lobes ovate, acute, 3 inner suborbicular, mucronate. Petals sericeous on parts exposed in bud, pale yellow. Stamens 15, unequal; filaments compressed at base, tapering abruptly medially and filiform below the oblong anthers; appendage to connective filiform, c. twice length of anthers. Ovary with stylopodium, cylindric-conical, attenuate, truncate, punctate in the distal 1/2, surmounted by a short style. Fruit glabrous. Pedicel c. 2 mm long. 2 longer calyx lobes to 3 by 0.5 cm, spatulate, c. 2 mm broad above the c. 5 by 3 mm ovate saccate thickened base; 3 shorter lobes to 3 by 3 mm, ovate, saccate, adpressed to the nut. Nut to 6 by 4 mm, ovoid, abruptly acute.
An emergent and canopy tree in undisturbed mixed dipterocarp forests at elevations up to 1,000 metres, where it is usually found on hillsides and ridges with rich clay soils. In secondary forests usually present as a pre-disturbance remnant tree.
More
Rare, in hill forests to 750 m.
Home
