Large climber up to 10-20 m. Young branchlets with a fulvous-patent-pilose (rarely appressed pilose) indumentum interspersed with glandular hairs, sometimes with the long patent hairs very few and the glandular hairs much denser. Leaves opposite, papyraceous, narrowly elliptic or narrowly oblong-ellptic, sparsely pilosulose above or nearly glabrous except for appressed hairs towards the base of the midrib, rather sparsely appressed-pilose or nearly glabrous below, up to 13 by 4½ cm, acuminate at the apex, cordate (rarely cuneate) at the base; nerves 6-10 pairs; petiole patent-pilose often glabrescent, 2-8 mm long. Inflorescence a terminal or axillary panicle, 10—15 cm long, ultimate branches slender. Flowers white or greenish-white, 4-merous, sessile. Lower receptacle (ovary) pubescent or pilose, 1 mm long; upper receptacle cupuliform, viscid, puberulous, 1½ by 3 mm with triangular, acute calyx-lobes, ¾ by 1 mm. Petals 4, elliptic, pubescent, 1½ by 0.8 mm. Stamens 8, exserted; filaments 3-3½ mm long; anthers ¾ mm long. Disk small, densely pilose. Style 3½-4 mm long. Fruit 1½-3½ by 1.3-2 cm, glandular or glabrous, oblong-ellptic in outline with 4 membranous wings 4-6 mm broad and with the withered flower sometimes remaining attached to the apex of the fruit until the latter is mature or nearly so.
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A climbing shrub. The stems can be 20-30 m long. The fruit are green.