Herbs, perennial, 40-75(-100) cm tall, rhizomatous, stoloniferous. Stems simple, strigillose. Leaves strigillose, margin entire, scabrous; basal leaves persistent, winged petiolate, oblanceolate to spatulate, 5-7 × 0.8-1 cm, base attenuate, apex rounded; cauline leaves gradually reduced upward, sessile or broadly winged shortly petiolate; blade oblong to oblanceolate, base cuneate, subclasping, apex acute or obtuse; upper leaves remote, sessile, linear, apex acute. Capitula 3-6 in open corymbose synflorescences, 2-2.5 cm in diam. Phyllaries 3-seriate, oblong, 4-8 × 1-1.5 mm, abaxially strigillose, leaflike above, margin narrowly scarious, erose-fimbriate, ± purplish, villous-ciliate (red crosswalls), apex acute, purple-tipped. Ray florets 35-40, white, mauve, or blue-violet, tube ca. 1.5 mm, sparsely hairy, lamina 7-12 mm; disk florets yellow, hairy, ca. 4 mm, tube ca. 1.5 mm, limb funnelform, lobes lanceolate, ca. 1 mm. Achenes light brown, obovoid, compressed, 2.5-3 mm, sparsely strigose, glandular distally, 2-ribbed. Pappus whitish, 3-seriate, bristles barbellate throughout; outermost bristles ca. 0.6 mm; inner bristles ca. 3 mm, acute; innermost bristles ca. 3.5 mm, clavate. Fl. Jul-Sep.
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