Plants 20-100 cm tall. Rhizomes 1.5-2 cm in diam. Leaves mostly basal. Basal leaves usually 1 or 2, green; petiole 20-35 cm, glabrous or pilose; leaf blade 15-25 cm in diam., margin palmately 7-9-lobed; lobes broadly triangular-ovate or obliquely triangular, 4-7 × 5-8 cm, glabrous to pilose, margin irregularly serrate, apex acute to shortly acuminate. Cauline leaves few, usually 2 or 3, much smaller than basal leaves. Inflorescence 40-80 cm; bracts linear, 1-3 mm; pedicels 5-10 mm, sparsely glandular hairy. Sepals ovate-triangular, 2.5-4 mm, sparsely glandular hairy. Petals pale yellow, narrowly oblong, 0.6-1.4 cm × 3.5-5 mm, sparsely glandular hairy, margin sparsely dentate distally, apex shortly acuminate. Filaments short, thick; anthers oblong. Ovary 1.2-1.4 cm × ca. 8 mm; stigmas ellipsoid or subovoid. Seeds ellipsoid, 0.8-1 mm. Fl. Jul-Oct. 2n = 22.
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