Plants 60--120 cm tall, pubescent. Stems dichotomously branched, smooth. Basal leaves withered at anthesis. Cauline leaf stipules pubescent, margin irregularly lobed or sinuate; petiole 2.5--7 cm, pubescent, base dilated; leaf blade 3-ternate, 10--20 cm; leaflet blade ovate, 1.6--3 × 1.3--2.9 cm, papery, base rounded to cordate, apex obtuse, 3-lobed; lobes toothed; veins raised abaxially, flat adaxially, pubescent. Inflorescence paniculate, many flowered. Pedicel 1.5--3.5 mm, densely pubescent. Sepals early deciduous, white, elliptic, ca. 2.5 mm, pubescent or abaxially glabrous. Stamens ca. 5 mm; filament base filiform, apex oblanceolate-linear, as broad as anther; anther oblong, ca. 1 mm. Carpels 6--8; style circinate, ca. 0.5 mm. Achene stipe short; body narrowly ellipsoid, 2--2.2 mm; veins ca. 6. Fl. Jul, fr. Aug.
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