Herbs 15-100 cm tall, perennial. Stem solitary, 6-8 mm in diam., erect, simple or apically branched, with sinuate-lobate, dentate wings, covered at base with fibrous remains of leaf sheaths. Leaves sessile, narrowly ovate-triangular, 5-18 × 0.8-2 cm, abaxially green and glabrous, adaxially dark green and sparsely arachnoid, base decurrent, margin sinuate-lobate and doubly dentate, apex acute to long acuminate. Capitula 8-25, in a basally lax but apically clustered corymbiform synflorescence, long pedunculate to subsessile. Involucre broadly campanulate to subglobose, 1.5-2 cm in diam. Phyllaries in 4 or 5 rows, basally brown or straw-colored, apically green with a blackish to black margin, pilose, apex acute; outer phyllaries narrowly triangular-ovate, 8-10 × 2-3 mm; middle phyllaries narrowly elliptic, 10-13 × 1.5-2 mm; inner phyllaries linear, 13-14 × 1-1.5 mm. Corolla red, 1.1-1.5 cm, tube 6-9 mm, limb 5-6 mm, lobes 3-3.5 mm. Achene dark brown, cylindric, ca. 3 mm, obtusely 4-angled, glabrous, apex with a short crown. Pappus light brown; outer bristles ca. 2 mm; inner bristles 1-1.2 cm. Fl. and fr. Aug-Sep.
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