Herbs perennial. Roots fibrous, subequally thick. Stems 20--65 cm, hirsute, branched. Basal and lower stem leaves with petiole 4.5--20 cm, hirsute; blade ternate, broadly ovate in outline, 3--14 × 3.8--17 cm, thinly papery, sparsely strigose; leaflets petiolulate; central leaflet rhombic-ovate or broadly ovate, broadly cuneate or rounded-base truncate, margin 3-partite, denticulate; lateral leaflets obliquely broadly ovate, unequally 2-sect or 2-partite. Upper stem leaves smaller, shortly petiolate. Compound monochasium terminal, corymbose, 4--10-flowered; bracts leaflike. Flowers 0.9--1.3 cm in diam. Pedicel 1--4 cm, strigose. Receptacle hirtellous. Sepals 5, reflexed, narrowly ovate, 3--4 mm, strigose. Petals 5, narrowly elliptic or obovate, 4--7.5 × 2--3.8 mm, nectary pit covered by a scale, apex rounded. Stamens numerous; anthers oblong. Aggregate fruit subglobose, 7--9 mm in diam.; carpels numerous. Achene flat, obliquely obovate, 2.5--3 × 2.2--3 mm, glabrous, narrowly marginate; style persistent, triangular, ca. 1 mm, straight or uncinate at apex. Fl. Mar--Sep, fr. Apr--Nov.
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