Treelets to 8 m tall, glabrous; branches slender, smooth, gray-brown. Stipules membranous, linear-lanceolate, ca. 1 cm; petiole 1.5-3 cm, bilateral flattened into attenuate winged shape, without glands; leaf blade ovate, ovate-rectangular, or elliptic, 7-16 × 4-8 cm, papery, base obtuse, truncate, or sometimes shallowly cordate, usually oblique, margin entire, sparsely glandular abaxially in upper half near margin, with 2 glands at base of midrib; midrib elevated abaxially, lateral veins 8-10 pairs. Inflorescences terminal, 4.5-11 cm, female flowers at base, male ones at upper part, or sometimes male throughout. Male flowers: pedicels 1-2 mm; bracts ovate to ovate-lanceolate, 2-2.5 × 1-1.2 mm, margins irregularly serrulate, basal glands ovoid, bracts 3-or 4-flowered; calyx cup-shaped, 3-lobed, lobes irregularly serrulate; stamens (2 or)3, usually exceeding calyx; anthers globose, slightly shorter than filaments. Female flowers: bracts 3-partite almost to base, lobes lanceolate, 2-3 mm, usually central ones larger, lateral lobes each 1-glandular; pedicels stout, 6-10 mm; calyx lobes 3, triangular, nearly as long as wide; ovary ovoid, smooth, 3-celled; styles connate at base; stigma 3, revolute. Capsules triangular-globose, 10-15 mm in diam.; columella deciduous. Seeds oblate, 6-9 mm in diam., with tawny maculate stripes. Fl. May-Jun, fr. Jul-Sep.
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