Plants 0.6–1.5 m tall. Stems sulcate, pubescent or glabrescent. Stipules semicordate, large, herbaceous, margin sharply doubly serrate; petiole pubescent or subglabrous; leaf blade pinnate, with 2 pairs of lateral leaflets, abaxially densely white tomentose, sparsely pubescent, or glabrous, adaxially sparsely pubescent or glabrous; terminal leaflet palmately 5–9-parted, rather large, segments lanceolate to rhombic-lanceolate, margin lobed or sharply doubly serrate; lateral leaflets 3–5-parted, smaller than terminal one. Inflorescence terminal, paniculate, many flowered. Flowers bisexual, 5–7 mm in diam.; pedicel sparsely pubescent, glabrescent when old. Sepals ovate, glabrous abaxially. Petals white, obovate, base long clawed. Achenes basally attached to receptacle, shortly stipitate, erect, long ciliate along abaxial and adaxial sides. Fl. and fr. Jul–Sep. 2n = 28, 42–44.
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