Description from Flora of China
Herbs perennial. Stems twining, terete, 1-1.5 cm, densely brown pubescent and sparsely retrorsely hirsute. Petiole 3-5 cm, densely brown pubescent and sparsely retrorsely hirsute; leaf blade broadly cordate or broadly hastate-cordate, 5-10 × 3-8 cm, abaxially densely brown villous or strigillose along veins, adaxially sparsely strigillose or glabrescent, base deeply cordate; basal lobes rounded or acute at apex, margin entire, long ciliate, apex acuminate; ocrea membranous, densely pilose, apex acute, oblique. Inflorescence axillary or terminal, paniculate, 10-15 cm, densely pubescent and sparsely retrorsely hirsute; bracts ovate, 1-1.5 mm, pubescent, apex acuminate, each 2-4-flowered. Pedicel 2-2.5 mm, articulate above middle, sparsely pubescent. Perianth greenish, 5-parted; tepals broadly elliptic, 1.5-2 mm; tepals broadly elliptic, 1.5-2 mm. Stamens 8, included; filaments dilated at base. Styles 3, connate at base; stigmas capitate, densely papillate. Achenes included in persistent perianth, black, shiny, ovoid, trigonous, 2-2.5 mm. Fl. Jul-Sep, fr. Aug-Oct.
* Forests in valleys and on mountain slopes, forest margins; 1100-3000 m. S Gansu, Guizhou, Hubei, Hunan, S Shaanxi, Sichuan, Xizang, Yunnan.