Herbs, perennial, 30-120 cm tall, rhizomatous. Stems erect, branched in upper part, sulcate, glabrous or sparsely strigose. Leaves thin; lower cauline leaves withered by anthesis; middle leaves sessile, elliptic-lanceolate or lanceolate, 6-10(-15) × 1.2-2.5(-4.5) cm, abaxially strigose to glabrate, adaxially glabrous or glabrate, base gradually attenuate, margin incised-serrate, sometimes pinnatilobed, rarely entire, scabrous, veins prominent, apex acuminate; upper leaves reduced, linear-lanceolate, entire. Capitula 10-55 in open corymbiform synflorescences, 2.5-3.5 cm in diam. Involucres hemispheric, 5-7.5 × 7-12 mm; phyllaries 3-seriate, imbricate, oblong-lanceolate, abaxially sparsely strigillose, margin ciliate; outer phyllaries 3-4 mm, acute; inner phyllaries 4-5 mm, margin scarious, purplish, apex obtuse. Ray florets (13-)16-27(-29), pale lilac to bluish purple, tube 1-1.5 mm, lamina 1.5-1.8 × 0.2-0.25 cm; disk florets yellow, 3-4 mm, tube 1-1.3 mm, limb campanulate, hairy, lobes triangular, ca. 0.6 mm, glabrous. Achenes brownish, obovoid, compressed, 3-3.5 mm, strigose, margin pale 2-ribbed or sometimes 3-ribbed. Pappus reddish, 0.5-1.2 mm. Fl. and fr. Jun-Oct. 2n = 18.
Can be grown by cuttings, divisions or seedlings. Seeds needs stratification.
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