Liana > 15 m long. Stems terete, glabrous, striate, becoming lenticellate with age, producing scarce milky latex; cross section with a single vascular cylinder. Stipules lanceolate, early deciduous, 3-4 mm long. Leaves pinnately 5-foliolate; petiole unwinged, 4-9 cm long; rachis unwinged, 2.5-5 cm long; petiolules 3-5 (10) mm long, the distal one to 2.5 cm long, glabrous; leaflets chartaceous, glabrous, elliptical, oblong-elliptic or nearly ovate, 7-15 × 2.5-6 cm, the apex caudate, the base attenuate or acute on distal leaflet, obtuse or rounded on lateral ones, the margins entire, crenate or remotely subdentate; abaxial surface sparsely punctate, with primary and secondary veins slightly prominent; tertiary veins clathrate. Thyrses axillary racemiform, solitary, puberulent; bracts and bracteoles deltate, < 1 mm long; cincinni sessile or short stipitate (0-3 mm long), with persistent pedicel bases, 2-3 mm long, entire pedicel 3-3.5 mm long. Calyx minutely grayish tomentose, with 5 concave sepals, outer sepals ca. 1.5 mm long, inner sepals ca. 3.5 mm long, the anterior sepals connate along lower ⅓; petals obovate, ca. 3 mm long; disc glabrous, of 2 deltate lobes; stamens with widely flattened filaments. Capsule unknown.
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