Tree 4-30 m. Twigs bluntly angled or subterete, 1.5-3 mm diameter, early glabrescent, hairs 0.1 mm or less; older twigs sometimes tending to crack longitudinally, not flaking; lenticels often numerous, rather small but distinct. Leaves membranous, chartaceous, or coriaceous, elliptic-oblong to (oblong-)lanceolate, 7-20 by 2.5-6.5 cm, base attenuate or rounded, apex acute-acuminate, sometimes with blunt tip; upper surface olivaceous-brown, lower surface grey-brown, with sparse or dense subpersistent pale brown scalelike hairs 0.1 mm or less, sometimes (late) glabrescent; not papillose; dots absent; midrib flat or raised above, lateral nerves 15-20(-24) per side, at (50-)70-85° to the midrib, flat or sunken above, little raised, purplish and contrasting below, lines of interarching indistinct, venation usually ± contrasting in colour below; petiole 8-16 by 1.5-3 mm; leaf bud straight or curved, 7-16 by 1.5-2 mm, hairs 0.1 mm or less. Inflorescences between the older leaves, essentially of the Knema-typt: sessile or to 2(-4) mm pedunculate (in female), simple or forked, scar-covered, brachyblasts 1-5(-20) mm, minutely pubescent, glabrescent; bracts small, caducous; in male: with 3-7 flowers in a loose cluster, buds somewhat variable in size; female inflorescences 1-or 2-(or 3-)flowered; flowers with minute appressed hairs 0.1 mm or less, sometimes late glabrescent. Male flowers: pedicel 5-7 by 0.8(—1.5) mm, bracteoles small, caducous, 1-2 mm below the apex; buds (elliptic-)oblong, sometimes narrowed in the lower half, 7-9 by 2-3 mm, apex (narrowly) rounded or ± blunt, perianth lobes thicker lower down, inside with warty-bullate surface, possibly reddish when fresh; cleft c. 1/4, lobes thinly carnose, 2-2.5 mm long, 0.2-0.3 mm thick. Androecium 7-9 mm; androphore 3.5-4 by 0.5-1 mm, largely with appressed hairs 0.1-0.2 mm; synandrium elongate, 4-5 by 0.8-1 mm, thecae c. 16, sterile apex ± acute, 0.2-0.5 mm. Female flowers: pedicel 2.5-6 by 1-1.5 mm, bracteole caducous, 0.5-2 mm below the apex; buds ovoid(-oblong), narrowed towards the apex, 5-6.5 by 3-4 mm, lobes 1.5 mm long; ovary ovoid-oblong, including stigma 3-4.5 by 2(-2.5) mm, hairs 0.1-0.2 mm. Fruits solitary or paired, ovoid or oblong, or ± fusiform, sometimes asymmetrical, 3.5-5.5 by 2-3(-4) cm, apex narrowly rounded, blunt, or (sub)-acute-apiculate, base rounded, pseudostalk absent or broad, to 3 mm, hairs dense, scurfy, 0.1-0.2 mm or less, or wholly or partly (early) glabrescent; pericarp ± woody, (3-)4-8 mm thick, smooth or rugose; seeds ellipsoid, 2-3 cm; fruiting pedicel (rather) stout, 4-17 by 3-5(-6) mm, striate or often lenticellate and rugose, bracteole scar up to 7 mm below apex.
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