Herbs perennial. Rhizome lateral roots dense. Leaves basal, simple, long petiolate, conspicuously or inconspicuously 3- to 5-lobed to parted to middle, margin entire or toothed. Inflorescences scapose, 1-flowered; involucral bracts 3, whorled. Flowers terminal, bisexual. Sepals petaloid. Petals absent. Stamens numerous; filaments sublinear; anthers ellipsoid. Pistils numerous; ovary 1-ovuled. Styles persistent, short. Achenes ovoid.

Seven species: N hemisphere; two species (one endemic) in China.

(Authors: Fu Dezhi; Orbélia R. Robinson)