Herbs ca. 1.5 m tall, perennial. Stem solitary, erect, apically branched, unwinged. Basal and lower stem leaves petiolate; petiole 1-2 cm; leaf blade narrowly ovate, elliptic, or obovate, 10-21 × 3-7 cm, pinnately lobed or pinnately parted, both surfaces green, abaxially glabrous, adaxially scabrid, glandular, or glabrescent, base cuneate, margin sinuate-dentate, apex acute; main segments or lobes 3-5 pairs, triangular to narrowly triangular-ovate, margin entire or dentate, apex acute and mucronate. Middle and upper stem leaves gradually smaller upward on stem, narrowly elliptic, undivided, margin dentate, apex long acuminate. Capitula 1-4, on end of branch apices, solitary or in a corymbiform synflorescence, long pedunculate. Involucre tubular-campanulate, 5-8 mm in diam. Phyllaries in 5 or 6 rows, apex acute to subobtuse; outer phyllaries triangular-ovate, ca. 5 mm; middle phyllaries narrowly elliptic, 0.6-1.5 cm; inner phyllaries narrowly elliptic to linear, 1-1.8 cm. Corolla purple, ca. 1.3 cm, tube ca. 6 mm, limb ca. 4 mm. Achene ca. 4 mm, glabrous. Pappus white or yellowish brown; outer bristles 2-5 mm; inner bristles ca. 1 cm. Fl. Aug-Sep.
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