Climbing shrubs, mid-sized, deciduous. Branchlets densely reddish brown strigose, lenticels pale yellow-brown, prominent; pith white, lamellate. Petiole 5-6 cm, densely reddish brown strigose; leaf blade abaxially pale green, adaxially dark green, broadly oblong-ovate to broadly oblong-obovate, 7.5-9 × 6-7 cm, papery, abaxially strigillose on midvein and lateral veins, adaxially sparsely strigillose, midvein and lateral veins and transverse veins abaxially raised, lateral veins 7-9 pairs, base truncate to cordatulate, margin irregularly setose-serrulate, 2 small teeth in between 2 large ones, apex shortly acuminate to acute or obtuse. Inflorescences cymose, 1-flowered or few flowers fascicled; pedicels 1-1.3 cm, strigose. Flowers yellow. Sepals 5, ovate, unequal, ca. 6 mm, abaxially glabrous, apex acute. Petals 5, obovate, slightly unequal, 1-1.1 cm, apex rounded. Filaments ca. 4 mm; anthers yellow, ca. 1.2 cm, sagittate. Ovary ovoid, ca. 2.5 mm, densely pubescent; styles ca. 3 mm. Fruit unknown. Fl. Jun, fr. unknown.

● Mountain forests, valleys; 2000-2100 m. Sichuan, Yunnan (Zhaotong).