Japan Flora: Perennial herb with slen­der elongate creeping rhizomes; leaves radical, 3-foliolate, the leaflets slightly pilose on both sides, toothed, the terminal one broadly rhombic-obovate, 2-3 cm. long, 1.5-2.5 cm. wide, shallowly 3-lobcd, the lateral ones oblique, the petioles 5-10 cm. long, slightly spreading-pubescent or glabrate; scapes 10， 20 cm. long, nearly as long as the leaves, sometimes sparingly spreading-pubescent, 1- to 3-flowered; flowers yellow, about 2 cm. across; calyx-segments broadly lanceolate, subacute; petals spreading; achenes 3-4 mm. white-pilose. May-June. Woods in mountains.

Hokkaido, Honshu (centr. and n. distr.). Sakhalin and Siberia.