Tall tree with flaky bark and prominent thin buttresses and a few stilt roots. Young twig, leaf bud, petiole and leaf beneath shortly densely greyish brown fugaceous pubescent; domatia persistently so. Twig to 1 mm ø apically, terete, slender, glabrous, smooth. Leaf bud to 1 mm long, minute. Stipule to 2 mm long, fugaceous. Leaves 5-12 by 1.5-4.5 cm, ovate-lanceo-late, thinly coriaceous; base cuneate, equal or sub-equal; acumen to 2 cm long, narrow, caudate; nerves 8-12 pairs, slender but distinct beneath, curved, with or without scattered axillary domatia; with few short secondaries; midrib slender, raised and frequently sharp on both surfaces, more prominently so beneath; petiole 5-10 mm long, short, slender. Panicle to 5 cm long, terminal or axillary, 1-2-axillary, lax, terete, puberulent to glabrous; singly branched, branchlets bearing to 6 flowers; bracteoles small, linear. Bud small, broadly ovoid. Calyx puberulent outside, fimbriate; 2 outer lobes ovate, acuminate; 3 inner lobes suborbicular, shortly mucronate. Petals narrowly lanceolate, shortly tomentose on parts exposed in bud, pale yellow. Stamens 15, in 3 whorls; filaments slender, tapering; anthers subglobose; appendage to connective c. 2 times length of anther, sometimes sparsely glandular papillose. Ovary ovoid, glabrous, without distinct stylopodium; style as long as ovary, setose in the basal half, glabrous distally. Fruit calyx glabrous; 2 longer lobes to 6.5 by 1.5 cm, long, spatulate, subacute, pronouncedly twisted, tapering to 5 mm broad above the to 6 by 6 mm deltoid thickened saccate base; 3 shorter lobes to 8 by 6 mm, shorter than the nut, broadly ovate, obtuse or subacute, saccate but thinner than base of outer lobes. Nut to 10 by 8 mm, broadly ovoid, glabrous; style remnant to 1.5 mm long, filiform.
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