Herbs 40-80 cm tall, perennial. Stem erect, branched apically, glabrous, leafy. Lower and middle stem leaves with petiole to 5 cm, winged, basally not widened and not clasping; leaf blade triangular to rhombic, 7-9.5 × 5.5-6 cm, undivided, base hastate to cuneate, margin mucronulately dentate, apex acuminate. Upper stem leaves similar to middle stem leaves or sessile, lanceolate to irregularly rhombic, 10-12 × 2-4 cm; uppermost leaves linear, 1.5-2.5 cm. Synflorescence narrowly paniculiform, with numerous capitula and capillaceous branches. Capitula with ca. 5 florets; peduncle capillaceous. Involucre ca. 10 × 2 mm. Phyllaries purple, abaxially glabrous; outer phyllaries ovate to lanceolate, largest ca. 3 × 1 mm, apex acute; inner phyllaries 5, apex obtuse to rounded. Florets purple. Achene subfusiform, ca. 5 mm. Pappus ca. 7 mm. Fl. and fr. Aug-Sep.
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