Herbs 70-120 cm tall, perennial. Stem solitary, 5-7 mm in diam., erect, apically much branched. Lower and middle stem leaves petiolate; petiole 1-3 cm; leaf blade narrowly ovate-elliptic to oblong, 10-20 × 3-4 cm, both surfaces green and glabrous or subglabrous, base rounded to truncate, margin denticulate, apex caudate-acuminate. Upper stem leaves shortly petiolate; leaf blade narrowly ovate-elliptic, 7-15 × 1-3 cm. Capitula numerous, clustered 5-7 at end of branches in a congested corymbiform synflorescence, shortly pedunculate. Involucre campanulate to obconic, 6-10 mm in diam. Phyllaries in 5-7 rows, straw-colored with green veins, subglabrous, scarious, apically bearded, apex obtuse; outer phyllaries ovate, 2-3 × 1-1.5 mm; middle phyllaries oblong to narrowly elliptic, 3-8 × 1-1.5 mm; inner phyllaries narrowly obovate-elliptic to linear, 8-10 × 1-1.5 mm. Receptacle bristles subulate, 5-7 mm. Corolla white or purple, 9-10 mm, tube 4-6 mm, limb 4-5 mm, lobes 3-3.5 mm. Achene cylindric, 4-5 mm, ribbed, glabrous. Pappus dirty white; outer bristles 2-3 mm; inner bristles 8-10 mm. Fl. and fr. Jul-Oct.
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