Plants: rhizomes proliferating underground. Flowering stems 15-60(-100) cm. Basal leaves: petiole (3-)6-18 (-27) cm; blade usually ± orbiculate-cordate, sometimes reniform, 3-9-lobed to 1/2 its length, (1.5-)2-8(-11) × (1.5-)3-8(-12) cm, margins 2-3-times crenate to dentate. Cauline leaves: stipules 1-2 mm expansions of petiole base, fringed with brown hairs. Inflorescences pyramidal, 5-10(-19)-flowered per primary branch. Pedicels densely stipitate-glandular. Flowers: hypanthium campanulate to turbinate, free portion (0.7-)0.9-1.2(-1.8) mm, densely stipitate-glandular; sepals erect, lanceolate to narrowly lanceolate, 1-2.5 mm, apex acute; petals spatulate to ovate, (2.5-)4-6(-7) × 1-2 mm, 2-3 times as long as sepals, base tapered to claw, margins plane; nectary green; stamens 1-1.5 mm; ovary 3/4 inferior. Capsules ovoid, turbinate, or urceolate. Seeds usually black, tuberculate. 2n = 14.
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