Tuber oblate-spheroid. Branches slender, sulcate-angular, densely pubescent at nodes. Tendrils 2-fid. Leaves pedately 7-foliolate; petiole 2-4 cm; leaflets elliptic-lanceolate to ovate-lanceolate, median leaflets 8-12 × 2-3.5 cm, lateral leaflets smaller, base cuneate, margin serrate, apex acuminate; petiolule 3-6 mm, densely pubescent. Inflorescence peduncle filiform; pedicel linear, 12-15 mm. Male flower unknown. Female flowers: bracts very small, subulate; calyx segments 5, ovate-lanceolate, ca. 10 × 3 mm, apex acuminate; corolla pale yellow to yellow-green, rotate, 15-20 mm in diam.; segments spreading, broadly ovate, ca. 12 × 8 mm; ovary ovoid-globose to narrowly ovoid, 8-11 × 4-6 mm. Fl. Sep.

● Broad-leaved forests; ca. 1800 m. S Sichuan.