Stem erect, 30-160 cm tall, 4-15 mm in diam. at base, proximally glabrous, distally white arachnoid-puberulent. Basal leaves petiolate; petiole 9-30 cm, glabrous, narrowly winged, gradually enlarged toward base into a sheath; sheath 7-11 cm, to 2 cm wide, oppositely amplexicaul, mouth of sheath spreading toward outside, forming an oblique petiole; leaf blade ovate-oblong or ovate-triangular, 4-25 × 3-20 cm, glabrous, pinnately veined, base shallowly cordate or truncate, margin regularly dentate, apex acute. Stem leaves sessile, erect, adnate, ovate-lanceolate, to 9 cm, smaller distally, tubular-amplexicaul. Synflorescence racemose, 15-40 cm; leaflike bracts narrowly lanceolate or rhombic, 2-3.3 cm × 3-4 mm, subentire or dentate, narrowed at base; peduncles 5-20 mm, smaller distally. Capitula numerous; supplementary bracts linear-lanceolate, 8-12 mm. Involucre campanulate, 8-10 × 5-8 mm, outside glabrous; phyllaries 8, in 2 rows, oblong, 2-3 mm wide, apex acute or obtuse; inner phyllaries broadly membranous at margin. Ray florets 5-7, yellow; lamina oblong or obovate-oblong, 1.4-1.8 cm × 3-4.5 mm, apex obtuse; tube ca. 4 mm. Tubular florets numerous, 7-8 mm; tube ca. 3 mm. Achenes brown, cylindric, ca. 5 mm. Pappus yellow, as long as tubular corolla. Fl. and fr. Jul-Oct. 2n = 58*.
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