Tuber enlarged. Stem and branchlets slender, sulcate, nodes densely pubescent. Leaves pedately 5-9-foliolate; petiole 2.5-5 cm; leaflets elliptic-lanceolate, margin sparsely dentate; median leaflets 6-11 × 2-3.5 cm. Male inflorescence dichotomously cymose; peduncle flexuous, 13-17 cm; calyx segments ovate-lanceolate, 4-5 × 3-4 mm, apex reflexed; corolla pale yellow-green, bowl-like, 8-10 mm; segments obovate, 7-8 × 4-5 mm, fleshy, apex reflexed; filaments ca. 1 mm. Female flower unknown. Fruit broadly to narrowly elliptic, (6-)11-17 × 2-3 cm, indistinctly costate; fruiting pedicel with distinct articulation, 1-2 cm. Seeds dark brown, oblong, almost unwinged, margin 2-4 mm. Fl. Jun-Sep, fr. Aug-Nov.