Asarum caudigerum var. cardiophyllum (Franchet) C. Y. Cheng & C. S. Yang.

Herbs. Rhizomes vertical, 2-3 mm in diam., internodes 2-6 cm. Leaves paired; petiole 2-5 cm, puberulent to villous; leaf blade sometimes with white blotches along veins, cordate, 3-5 × 3-5 cm, both surfaces strigose puberulent, base cordate, lateral lobes 2-3 × 2-3 cm, apex acute to rounded; cataphylls linear to broadly elliptic, 4-14 × 2-9 cm. Peduncle erect to ascending, 1.5-2 cm. Calyx green, ± campanulate, 2-3 × 0.6-1 cm; sepals free beyond attachment to ovary, abaxially sparsely white villous; pseudotube subglobose, 0.3-0.6 × 0.8-1 cm; lobes erect or spreading, 1-1.5 × 0.3-0.6 cm, base linear-triangular, apex abruptly narrowed to a slender cauda 5-11 mm. Stamens 12; filaments as long as anthers; connectives extended beyond anthers, rhomboid. Ovary inferior. Styles connate, apex 6-cleft; stigmas terminal. Fl. Mar-May.

* Forests, on mountain slopes, along streams; ca. 1100 m. Sichuan, Yunnan.