Tree 10-35 m. Twigs 1-2 mm diameter, glabrescent, hairs 0.1 mm or less; older twig with numerous small pale lenticels, contrasting or not. Leaves membranous or thinh coriaceous, elliptic-oblong, 4.5-15 by 1.5-5(-6) cm, base narrowly rounded or cuneate apex up to 20 mm acute-acuminate; upper surface olivaceous or blackish brown, lowe surface early glabrescent (subsp. montanoides) or with persistent indumentum (subsp lepidota), hairs interwoven, pale cinnamon or greyish, 0.1-0.2 mm; papillation indistinct; dots absent; midrib slightly raised above, lateral nerves 6-14 per side, at 45(-60) to the midrib, flat or sunken above, brown and contrasting below, lines of interarchinj distinct or not, venation clearly visible below; petiole (5—)10—17 by 1-1.5 mm; leaf bud 7-10 by 1 mm, hairs 0.1(-0.2) mm. Inflorescences between the leaves or below; of the Knema-type: sessile or up to l(-2) mm pedunculate, simple or branched scar-covered brachyblasts to 4 mm long, 1.5 mm wide, minutely woolly brown pubescent; in male with clusters of 4-8 flowers, buds of strongly variable sizes; bracts minute; in female smaller, 2-5-flowered; flowers with hairs 0.1-0.2(-0.3) mm. Male flowers: pedicel I-, mm long, bracteole 0.5(-l) mm, (late) caducous; buds ellipsoid-oblong, apex and basi truncately broadly rounded, 2.5-3(-4) by 1-1.4 mm, cleft 1/3-1/4, lobes 0.2 mm thick Androecium slender, 2-2.6 mm long; androphore 1-1.2 by 0.4-0.5 mm, glabrous o with hairs less than 0.1 mm in the lower half; synandrium 1.2-1.5 by 0.4-0.5 mm, the cae 10-12, sterile apex absent or ± acute, to 0.2 mm. Female flowers: pedicel 1.5 mm buds ovoid, 2.5 by (1.5—)2 mm; ovary ovoid-oblong, 1.5-2 mm, hairs 0.1 mm, style anc stigma 0.3 mm. Fruits solitary or paired, subsessile, ± ellipsoid-oblong, 2-3 by 1.2-1.8 cm, apex blunt or (sub)acute, or 1(-2) mm beaked, base ± rounded or narrowed into the stalk, hairs scurfy, 0.1 (-0.2) mm; pericarp 2-3 mm thick; seeds ellipsoid(-oblong) 2 cm; fruiting pedicel stout, 3-4 mm long and broad.
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