Tree 5-8 m. Twigs when young narrowly ridged, 4-7(-10) mm diameter, early or late glabrescent, with ± woolly hairs 0.2-0.5 mm long; bark coarsely striate, lenticellate, not flaking. Leaves thickly membranous, (elliptic-)oblong, (18—)25—38 by (6-)7-13 cm, base short to long-attenuate, apex attenuate-acuminate; upper surface drying dark brown, lower surface early or late glabrescent or with rather scattered stellate hairs 0.2-0.5 mm long; dots absent; midrib above ± narrow, flattish; nerves 18-22 pairs, above thin, flat or sunken; lines of interarching beneath not very prominent; venation lax, indistinct on both surfaces; petiole 4-6 by 3-4 mm; leaf bud 25-40 mm long, with hairs 0.2-0.5 mm. Inflorescences below the leaves; in male: many-flowered, 4 to 5 times branched, 25-35 by 20-30 cm, peduncle 4-5 cm; in female: 9-10 by 6-8 cm; all branches with rather loose hairs 0.2-0.5 mm long; bracts (seen only in female) 5 mm long, caducous. Flowers 2-5 together in male and female, with loose hairs (0. l-)0.2-0.3 mm long, in female glabrescent towards apex; perianth 2-lobed; pedicel not articulated. Male flowers: pedicel 2-4 mm long, buds largely hollow, broadly obovoid, laterally ± flattened, 3-3.3 by 3-3.2 mm, apex obtuse to broadly rounded, base shortly tapering, cleft c. 1/3, lobes 0.3 mm thick; androecium small, ± flattened, 2.5 by 1-1.2 mm, apex broadly rounded, synandrium 1.5-1.8 by 1-1.2 mm, narrowly hollowed for 1/5-1/3 at apex (Plate 1: 20); thecae 14, free apices 0.1-0.2 mm; androphore 0.8-1 by 0.5-0.6 mm. Female flowers: pedicel 1-2 mm long, buds broadly ovoid, 3 by 2.6-2.8 mm, cleft c. 2/3; ovary broadly ovoid, 2-2.2 by 1.8-2 mm, densely pubescent with hairs 0.1 mm or less, stigma short, not or hardly lobed, 0.1 by 0.4 mm. Fruits not seen.
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