Herbs perennial. Roots fibrous, subequally thick. Stems 14--45 cm, glabrous or rarely sparsely puberulent above, simple or 1-or 2-branched. Basal leaves 1(--3); petiole 5--14 cm, glabrous; blade 3-lobed, sometimes 3-partite or 3-sect, reniform or orbicular-ovate, 1.2--3.6 × 2--5 cm, papery, sparsely puberulent, base cordate or subcordate, rarely subtruncate, margin dentate. Stem leaves 2, sessile, 3--7-sect, 1.5--3.5 cm, segments narrowly lanceolate or linear, entire. Flowers solitary, terminal, 1.2--1.8 cm in diam. Receptacle puberulent or glabrous. Sepals elliptic, 4--5 mm, abaxially puberulent. Petals 5, obovate or broadly obovate, 5.5--8.5 × 4--8 mm, apex rounded. Stamens numerous; anthers oblong. Aggregate fruit ovoid, ca. 6 × 5 mm. Achene slightly bilaterally compressed, obliquely obovoid, 2--2.8 × 1.8--2 mm, puberulent; style persistent, 0.6--1 mm. Fl. Apr--Jun.
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