Young twig, leaf bud, stipule outside and petiole persistently c. 3 mm long golden-brown tufted tomentose, shorter on nervation beneath, midrib above and margin; leaf fugaceous pubescent above. Twig c. 3 mm ø apically, smooth. Bud 4-6 by 1.5-2 mm, small, oblong, obtuse. Stipule c. 3 by 0.5 cm, lanceolate, obtuse. Leaves 6-9 by 3-5 cm, elliptic, chartaceous, obtuse or shortly acuminate, base obtuse, margin revolute, persistently somewhat folded between the 13-15 pairs of nerves; petiole 1.5-2.5 cm long, slender. Raceme to 12 cm long, terminal or axillary, terete, golden long tomentose, unbranched or singly branched, branchlets bearing c. 4 flowers; bracts to 30 by 8 mm, linear, acute, sparsely tomentose outside, glabrous within. Flower bud to 3.5 by 0.8 cm. Calyx and corolla typical, calyx glabrous. Stamens 15, shorter than the style; filaments short, anthers filiform, tapering; appendage as long as anther, slender, undulated towards the apex. Ovary ovoid-conical, shortly pubescent; style and stylopodium filiform, slender, 4-5 times as long as ovary, shortly pubescent but for the distal 1/3. Fruit subsessile. Fruit calyx glabrous, tube 1.5-1.8 by 0.6-0.8 cm, neck 0.4-0.6 cm ø; two longer lobes to 8 by 1.5 cm, oblong, lanceolate, acute, prominently 1-nerved; 2 shorter lobes to 3 mm long, deltoid, acute.
A canopy or emergent tree in mixed Dipterocarp forest, where it is usually found on undulating land and low hills, growing on leached clay-rich soils mainly at low elevations and rarely ascending to 850 metres.
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Widespread on undulating land and low hills, rarely to 850 m, on leached clay-rich soils in mixed Dipterocarp forest.
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