Description from Flora of China
Herbs. Rhizomes horizontal, 1-2 mm in diam., internodes 1.5-4.5 cm. Leaves paired on flowering modules, solitary on nonflowering modules; petiole 5-12 cm, glabrous; leaf blade uniformly colored, cordate, 2.5-4 × 3-6 cm, both surfaces pubescent along veins or abaxial surface glabrous, base cordate, lateral lobes 0.7-2 × 1-2.5 cm, apex acute or obtuse; cataphylls ovate, ca. 1 × 0.7 cm. Peduncle pendent, 1-1.5 cm. Calyx actinomorphic, purple, campanulate, 0.7-1.4 × 0.5-0.9 cm; sepals connate beyond attachment to ovary, abaxially sparsely white villous; tube subglobose, 0.3-0.5 × 0.5-0.7 cm; lobes erect, triangular, 0.3-0.4 × 0.2-0.3 cm. Stamens 6-9; filaments as long as anthers; connectives not extended beyond anthers, obconic. Ovary inferior. Styles connate, slender, apex 6-cleft; stigmas terminal. Fl. May-Jun.
This species is used medicinally.
* Mixed forests, along streams, moist places, rock crevices; 1300-2300 m. Anhui, Hubei, Shaanxi, Sichuan.