Herbs perennial. Roots fibrous, thickened at base. Stems 4--7, cespitose, 6.5--18 cm, sparsely appressed puberulent or glabrescent, branched or simple. Basal leaves 3--7; petiole 3--8 cm, glabrous or subglabrous; blade ternate, orbicular-ovate or deltoid in outline, 0.9--1.4 × 1.3--2.2 cm, herbaceous or papery, glabrous or abaxially sparsely puberulent, base cordate; central leaflet flabellate-obovate, cuneate, or rhombic, 3-lobed; lobes ovate, undivided or unequally 2-lobulate; lateral leaflets obliquely flabellate, unequally 2-partite, petiolule 1.5--3 mm. Stem leaves 2, lower 1 ternate, long petiolate; upper 1 moderately long or short petiolate, 3-sect. Flowers solitary, terminal, 0.8--1 cm in diam. Receptacle glabrous. Sepals 5, elliptic, 3--4 mm, abaxially pubescent. Petals 5, elliptic-obovate, 3.8--4.8 × 1.5--2.8 mm, nectary pit without a scale, apex rounded. Stamens 7--14; anthers oblong. Aggregate fruit narrowly ovoid, 3--7.5 × 2--3 mm. Achene obliquely obovoid, 1--1.2 × 0.8--1 mm, glabrous; style persistent, 0.3--0.6 mm. Fl. Jul--Aug, fr. Aug.
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