Herbs 0.8-1.2 m tall. Stems glabrous. Leaves pinnately compound; petiole 3.4-28 cm, brown long pilose at base; leaflets 3-9(or 10), obovate or oblong to lanceolate, 5.6-20 × 1.7-9 cm, abaxially pilose along veins, adaxially strigose or glabrous, base cuneate, margin doubly serrate, apex shortly acuminate. Basal and proximal cauline leaves usually with 3 terminal leaflets and 6 or 7 lateral, usually opposite, rarely alternate leaflets. Pleiochasium paniculate, 13-38 cm; branches 5.3-12 cm, densely paleaceous hairy; pedicels 2-3 mm, densely paleaceous hairy. Sepals 5, subovate, ca. 2 × 1.5-1.8 mm, abaxially sparsely tawny paleaceous hairy, adaxially glabrous, apex shortly acuminate. Petals absent. Stamens ca. 3 mm. Carpels 2, proximally connate, ca. 3 mm; ovary semi-inferior; styles 2. Fl. and fr. May-Oct. 2n = 60*.
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