Root fibrous; tuber absent. Leaves pedately 7-foliolate; petiole 1.8-3 cm; leaflets oblong-lanceolate to obovate-lanceolate, 5-10 × 2-3.5 cm; petiolule 4-7 mm. Inflorescence largely cymose; peduncle 5-20 cm, densely pubescent. Male flowers: pedicel filiform, 1-2 mm; calyx segments spreading, triangular, ca. 2 × 1 mm; corolla spreading, yellowish to pale yellow-green, rotate, 5-6 mm; segments obovate, 3-4 × ca. 2 mm, thinly membranous; filaments short, ca. 1 mm. Female flowers: calyx and corolla as in male flowers; ovary narrowly cylindric, base attenuate. Fruit conical, 2.5-3.5 × 1-1.5 cm; fruiting pedicel curved, 5-6 mm. Seeds oblong, compressed, 12-14 × 5-6 mm, with membranous wing, wing 3-4 mm at both ends of seed, seed body obovate. Fl. Jun-Sep, fr. Aug-Nov. 2n = 28.
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