Rather slender sparingly branched herb up to 5 dm. tall; ± pilose to glabrate. Stock rather stout, bearing ∞ radical lvs on petioles up to 12 cm. long. Lamina (5)-15-20 cm. diam., submembr., reniform with open sinus to broadly ovate-cordate to subpeltate; glab. or nearly so above, ± sparsely clad below in slender white hairs; margin shallowly to rather deeply 2-3-lobed; lobes crenate or again lobed. Cauline lvs on petioles up to 7 cm. long, 3-lobed, lobes up to 4 × 1 cm. Scape glab. to pilose, up to 5 dm. long, with 5-15 fls. Fls 2-4 cm. diam.; sepals ± 1 cm. long, becoming reflexed, ovate-oblong, hairs long; petals 5-6, 1·5 × 1 cm., bright yellow, obovate, rounded to emarginate at apex. Fruiting heads broadly conical, c. 7-10 mm. diam.; achenes obovate in outline, compressed, c. 2 mm. long, keeled at back, style 1-1·5 mm., slender.
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