Herbs perennial. Roots fibrous, subequally thick. Stems ascending or subprostrate, 8--50 cm, hirsute, branched, rarely simple, rooting at lower nodes. Basal leaves 3--7; petiole 2.5--14 cm, hirsute; blade ternate, ovate in outline, 1.5--5.4 × 2.6--7 cm, papery, strigose; central leaflet petiolulate, broadly rhombic or broadly rhombic-ovate, margin 3-cleft to middle, few dentate; lateral leaflets petiolulate, obliquely broadly obovate, unequally 2-lobed or 2-partite. Stem leaves similar to basal ones, with shorter petioles. Flowers leaf-opposed, 0.9--1.8 cm in diam. Pedicel 0.7--4.6 cm, densely strigose. Receptacle puberulent. Sepals 5, reflexed, narrowly ovate, 4--6 mm, abaxially strigose. Petals 5, narrowly obovate or long elliptic, 5--9 × 2.5--4 mm, nectary pit covered by a scale, apex rounded. Stamens numerous; anthers oblong. Aggregate fruit subglobose, 8--10 mm in diam.; carpels numerous. Achene flat, obliquely obovate, 3--4 × 2.2--3 mm, glabrous, broadly marginate; style persistent, ca. 1 mm, curved at apex. Fl. Mar--Oct.
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