Herbs, perennial, 15-100 cm tall. Rhizomes horizontal, longer than 20 cm. Stems erect, densely scaberulose or subglabrous. Basal leaves rosulate, petiolate; blade narrowly elliptic, 3-8 cm, pinnatifid to pinnatisect; segments 1-5 pairs, ovate to linear-lanceolate; terminal segment usually larger, ovate to ovate-lanceolate, margin serrate or crenulate. Cauline leaves subsessile or petiolate; lower leaves pinnatisect, with 2-6 pairs of segments; terminal segment ± larger, broadly ovate to linear-lanceolate, 7-9 × 5-6 cm, apex acuminate to long acuminate. Middle and upper leaves often undivided, or with 1 or 2 pairs of segments; terminal segment larger, ovate, ovate-lanceolate, or subrhombic, crenulate. Inflorescence corymbiform; peduncles densely hispidulous; lower involucral bracts with 1 or 2(-4) pairs of linear segments; upper bracts entire, linear, subequal to or longer than inflorescence. Calyx lobes conspicuous or inconspicuous, ovate, ovate-oblong, or ovate-deltoid, 0.1-0.3 mm. Corolla campanulate; tube 1.8-2.4 mm, 1.5-2 mm in diam. distally; lobes ovate or ovate-elliptic, 0.8-1.8 × ca. 1.6 mm. Stamens 4, exserted; longer filaments 3-3.6 mm; shorter filaments 1.9-3 mm; anthers oblong, ca. 1.2 mm. Ovary ovoid or oblong, 0.7-1.5 mm; style slightly curved, 2.3-2.7 mm; stigma peltate or capitate. Achenes oblong or obovoid, hispidulous, or glabrescent on one or both surfaces, apex truncate; bracteoles obovate, obovate-oblong, or obovate-elliptic, rarely elliptic, 5.5-6.2 × 4.5-5.5 mm, 2(or 3)-veined, apex rounded, shallowly 3-lobed, or unequally 2-lobed on one lateral side. Fl. Jul-Sep, fr. Aug-Oct. 2n = 22*.
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