Perennial herb 50-150 cm tall, with creeping rhizomes. Basal lvs few, 3-foliolate; petioles sparsely appressed-tomentose, sulcate, (10)-15-40 cm long; leaflets 3-5-lobed up to 1/2 way, petiolulate, 2-serrate, bristly or sparsely hispid, green above, pale beneath, cordate at base, unevenly so on lateral leaflets, acute at apex, 5-12-(20) × 3-9-(15) cm. Subfloral lvs similar, smaller, becoming simple, 3-lobed, cuneate at base. Fls erect, 4-8 cm diam., (1)-3-8 in umbels; pedicels tomentose, 5-25 cm long. Perianth segments 7-14-(20), pink or rarely white, tomentose beneath, usually glabrous above. Achenes not maturing.