Lianas, woody. Branchlets terete, lenticels conspicuous, glabrous. Leaves pedately 4-or 5-foliolate; petiole ca. 5 cm; petiolules 1-1.6 cm, glabrous; leaflets elliptic, 5-13 × 4.5-5 cm, glabrous, lateral veins 9 or 10 pairs, veinlets slightly raised abaxially, inconspicuous adaxially, base rounded or broadly cuneate, margin sparsely toothed, apex acuminate or acute. Corymbose cyme leaf-opposed; peduncle ca. 1.5 cm, glabrous. Pedicel 2-5 mm, pubescent. Buds ovoid-elliptic, 1.5-2 mm, apex subrounded. Calyx saucer-shaped, pubescent, margin undulately toothed. Petals oval, apex galeate, pubescent. Style short, thick; stigma 4-lobed. Fl. Apr.
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