Rhizome prostrate or ascending, long, 2--3 mm in diam., also nodulose, short, 4--8 mm in diam. Scalelike leaves 2 or 3, 1--2 cm. Leaf solitary, developing close to scape; petiole 5--20 cm, glabrous or sparsely puberulent; leaf blade ternate, pentagonal or orbicular-obovate, 2--5 × 2--4 cm, subglabrous or sparsely pubescent; petiolules 10--30 mm; central leaflet 3-lobed or deeply toothed, obovate to elliptic, base cuneate to truncate, margin coarsely crenate to serrate, apex obtuse; lateral leaflets obliquely oblong or ovate, similar to central one. Scape 10--30 cm, subglabrous; cyme 1-flowered. Involucral bract petiole 5--12 × 1--2 mm, glabrous; bract blade ternate, similar to that of leaves, rhombic-pentagonal, 2--4 × 2--5 cm, sericeous; leaflets subsessile, narrowly ovate, apically deeply obtusely toothed. Pedicel 1--3 cm, sparsely puberulent or subglabrous. Sepals 9--15, white or white tinged purple, linear-oblong, 12--20 × 4--5 mm, glabrous, basal veins 3--5, vein anastomoses 1--3, base and apex rounded. Stamens 4--8 mm; filament filiform, base and apex slightly dilated; anther cylindric. Ovary ovoid, ca. 2 mm, pilose; style straight, short; stigma linear. Achene body narrowly ovoid, slightly compressed, ca. 3 × 1.5 mm, narrowly ribbed, villous, hairs ca. 0.2 mm; style curved, 1--1.5 mm. Fl. Apr--May.

Forests, shady places in valleys, shady grassy places; 500--1000 m. Heilongjiang, E Jilin, Liaoning, E Shandong, N Zhejiang [Japan, Korea, Russia (Far East)].