Large liana (up to 30 m by 7.5 cm), rarely a shrub or small tree (up to 7 m by 18 cm). Branches glabrous, sometimes distinctly lenticellate. Leaves 1-2-jugate, sometimes without a terminal leaflet; petiolules 0.5-0.75 cm. Leaflets oblong-ovate to lanceolate-oblong, sometimes slightly oblique, 5.5-27 by 3½-12½ cm, thin-chartaceous to thin-coriaceous, glabrous; base acute to broadly rounded, sometimes even cordate, rarely subpeltate, often slightly decurrent; apex tapering blunt-acuminate; nerves 5-10 pairs, the basal pair originating from the very base of the leaflet, all slightly curving to near the apex, not distinctly joined; veins rather inconspicuous, mainly transverse to the midrib. Inflorescences up to c. 35 by 30 cm, more or less densely fulvous-tomentose, rather many-flowered. Bracts minute. Sepals ovate to elliptic, acute, 2½-3½ by 1-1.5 mm, not keeled, outside rather densely, inside more sparsely, minutely appressed-pubescent, the apex with a few bristle-like capitate-glandular hairs. Petals linear, blunt, white, pink, or cream-coloured, often distinctly red punctate, 6-7 mm long, outside sometimes with a few scattered glandular hairs near the base and the apex minutely tomentose, inside glabrous. Stamens for 0.5 mm connate, in Philippine specimens usually all fertile, in W. Malaysian ones epipetalous stamens usually sterile to staminodial and sometimes even partly absent; filaments, at least of the long stamens, with scattered glandular hairs. Fruits coarse, obovoid, 5-7 by 3½-4 by 2 cm, without or with a short stipe (up to 2 cm); beak acute, often hooked, inserted at 60-90% of the height; pericarp rather smooth, glabrous, woody, c. 2 mm thick, inside densely ferruginous-pubescent.
In primary, secondary, and mossy forests, usually along the edges, in more open places, and along river-banks, also on a marshy soil, up to 1400 m. Fl. (March-)May-Aug.(-Dec.), fr. (Jan.-)June-Aug.(-Dec.).
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