Herbs 1-2 m tall, perennial. Stem solitary, ca. 1 cm in diam., erect, branched from middle or apically, hollow. Basal leaves usually withered at anthesis, petiolate. Middle stem leaves sessile or subsessile; leaf blade oblong-elliptic to narrowly ovate-elliptic, 6-15 × 1-4 cm, both surfaces green and strigose, abaxially glandular, margin entire or irregularly dentate, apex acute to acuminate. Upper stem leaves narrowly ovate-elliptic to linear. Capitula numerous, in a long and spreading corymbiform-paniculiform synflorescence. Involucre cylindric to narrowly campanulate, 5-7 mm in diam. Phyllaries greenish, colored in apical part, pubescent, apex subobtuse to obtuse; outer phyllaries ovate to ovate-oblong; inner phyllaries linear-oblong. Receptacle bristles ca. 3 mm. Corolla bluish purple, ca. 1.4 cm, tube ca. 7 mm, limb ca. 7 mm. Achene smooth, 7-8 mm. Pappus dirty white; outer bristles ca. 3 mm; inner bristles 8-10 mm. Fl. and fr. Jun-Aug.
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