1a. Caltha palustris var. palustris
驴蹄草(原变种) lu ti cao (yuan bian zhong)
?Caltha palustris var. orientalisinensis X. H. Guo.
Stems usually erect, hollow, to 50 cm tall, ca. 6 mm in diam. at fruiting. Leaf blade orbicular-reniform or suborbicular, rarely triangular-reniform, herbaceous or subpapery, base usually deeply cordate, margin dentate. Pedicels more than 2 cm, to 15 cm at fruiting.
Mountain regions, wet places, grassy slopes, valleys, marshlands, forests; 600--4000 m. S Gansu, Guizhou, Hebei, W Henan, Nei Mongol, Shanxi, Sichuan, Xinjiang, E Xizang, NW Yunnan, Zhejiang [temperate to cold regions of northern hemisphere].