Stems 1–2 m, paniculately branched; herbage sparsely hispid, hairs simple, forked, and stellate. Leaf blades 5-or 7-lobed, 5–10 cm wide, lobes lanceolate to triangular, base truncate to cordate, margins with coarse rounded to pointed teeth. Inflorescences solitary flowers or few-flowered clusters forming open panicles; involucellar bractlets linear to linear-lanceolate, 5–10 × 1 mm, 1/3–1/2 calyx length. Flowers: calyx 15–20 mm, lobes lanceolate to ovate-lanceolate, 10–15 mm, longer than wide, exceeding tube, hirsute with few-rayed hairs 1–2 mm; petals deep rose-purple, 1.5–2.5 cm.