Herbs 15-50 cm tall, perennial. Stems solitary or few, erect, simple or branched from base, narrowly winged; wings dentate. Basal and lower stem leaves petiolate; leaf blade narrowly elliptic, 3-12 × 1.5-2.5 cm, bipinnately parted, both surfaces green, sparsely pubescent, and gland-dotted; primary lobes 5-10 pairs; secondary lobes obliquely triangular, narrowly triangular-ovate, or toothlike, margin dentate; teeth and apex cartilaginous mucronate. Middle and upper stem leaves sessile, narrowly elliptic to linear, pinnately divided, pinnately lobed, or undivided. Capitula numerous, in a corymbiform synflorescence, subsessile to shortly pedunculate. Involucre campanulate, 0.8-1.5 cm in diam. Phyllaries in 4 or 5 rows; outer phyllaries narrowly ovate, 4-5 × 1.5-2 mm, appendage green, herbaceous, ± reflexed, and mucronate; middle phyllaries narrowly ovate-elliptic, 6-8 × 1.5-2 mm, appendage green, herbaceous, widened, margin dentate, and apex mucronate; inner phyllaries narrowly elliptic to linear, 9-11 × 1.5-2 mm, appendage purplish, membranous, villous and gland-dotted, and margin erose-denticulate. Corolla reddish purple, 1-1.4 cm, tube 6-7 mm, limb 4-6 mm, lobes 3-4 mm. Achene dark brown, cylindric to obconic, (2-)3-4 mm. Pappus yellowish white; outer bristles 1-5 mm, scabrid to plumose; inner bristles 9-10 mm. Fl. and fr. Jul-Aug. 2n = 28.
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