Woody vine 10-15 m long. Stems terete, pubescent or tomentulose, glabrescent, producing scanty milky sap; cross section with a single vascular cylinder. Leaves pinnately 5-foliolate; petiole and rachis unwinged, terete, striate, tomentulose to nearly glabrous; petioles 5-10 cm long; rachis 3-6 cm long; petiolules 3-6 mm long; leaflets coriaceous, abaxial surface sparsely puberulent, especially along veins, oblong-elliptic to obovate, 6-10 × 3.2-6 cm, the base obtuse to rounded, the apex obtuse or rounded, with a short, obtuse apiculum, the margins subentire or obsolete dentate; tertiary veins clathrate. Thyrses axillary, racemiform, 7-14 cm long, with stout, tomentulose axes; cincinni sessile, few-flowered. Calyx abaxially ferruginous-pubescent, with 4 sepals, outer sepals ca. 1 mm long, inner sepals ca. 3 mm long. Capsule 3-winged, slightly woody, turning from green to orange-red, ferruginous tomentose, stipitate, the locule ellipsoid to pyriform, 1.7-2 cm long, the wings of similar size or one of them shorter, projecting beyond the apex of the locule, decurrent toward the stipe, 0.7-1 cm wide, crenate on margins, the endocarp glabrous. Seed solitary, ca. 1.2 cm long, ellipsoid, dark brown, with a sarcotesta on lower half.
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