Herbs perennial. Roots fibrous, robust, subequally thick. Stems 4.5--15 cm, glabrous or sparsely puberulent, often long branched from base. Basal leaves 4; petiole 1.8--5 cm, glabrous; blade ternate, ovate or rhombic-ovate in outline, 0.8--4 × 0.8--4 cm, papery, glabrous, central leaflet rhombic or broadly rhombic, 3-partite or 2 × ternate-dissected, usually long petiolulate, ultimate lobules narrowly oblong or linear; lateral leaflets smaller, petiolulate, oblique. Stem leaves similar to basal ones but smaller, short petiolate. Flowers solitary, terminal, 1.1--1.6 cm in diam. Receptacle glabrous. Sepals 5, narrowly elliptic, 4--5 mm, abaxially subglabrous or sparsely puberulent. Petals 5 (--7), narrowly obovate or obovate-oblong, 6--9 × 2.5--4.2 mm, nectary pit without a scale, apex rounded. Stamens numerous; anthers oblong. Aggregate fruit subglobose, 3.5--5 mm in diam. Achene slightly bilaterally compressed, obliquely elliptic, 1.8--2(--3) × 1--1.2 mm, sparsely puberulent or glabrous, carpophores 0.3--0.6 mm; style persistent, ca. 0.4 mm. Fl. Mar--Oct.
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