Liana. Stipules +-intrapetiolar, lanceolate, ⅔-1 mm long, the scars united in a ring on the older branchlets. Leaves chartaceous to thin-coriaceous, sometimes shining above, elliptic to elliptic-lanceolate, ovate-oblong to lanceolate, sometimes broad-elliptic or-ovate, rarely obovate, (5.5-)10-20.5 by (3-)5-8 cm; base obtuse, cuneate; apex acute, short-acuminate to acuminate; margin subentire rarely slightly crenulate; nerves 6-8 pairs; petiole 0.5-1 cm. Inflorescences sometimes ramiflorous, 1-6 cm long, up to 5 times branched, usually glabrous rarely sparsely light yellowish puberulous; sometimes flowers on a young, axillary short-shoot with bracts or reduced leaves and such shoot resembling a thyrsiform inflorescence. Peduncle 1/3-3 cm. Bracts deltoid, c. 1.5 mm long. Pedicels 5-7 mm, the central one usually longer, up to 10 mm, sometimes with elastic threads shown on breaking. Flowers green or yellowish green, rarely yellowish. Calyx lobes deltoid, 1-1.25 mm long, puberulous outside. Petals ovate-oblong, 4.5-6.5 by 1.75-2.5 mm, densely pilose (uniseriate hairs) on the upper half or ⅔ inside and on the margins. Disk annular-pulvinate, 1 1/3-3 mm ø, 1/3-2½ mm high, the basal part before the calyx lobes slightly extended obliquely outward and downward, pilose (uniseriate hairs) at the top, very rarely glabrous when young. Stamens c. 2 mm. Pistil 1-2 mm emerging from the disk. Ovules 4-6 in each cell. Follicles ovate-or elliptic-oblong, obtuse at the apex, 5-8 by 2-3.5 cm. Seeds (incl wing) obovate-oblong, 3½-6 by 0.5-1 cm.
In lowland forests up to 400 m, also found in river flood plain, riverside, and mangrove swamp forests.
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