Stem erect, 50-70 cm tall, 3-4 mm in diam. at base, proximally glabrous, distally and synflorescence white arachnoid-puberulent. Basal leaves petiolate; petiole to 25 cm, base sheathed, proximally glabrous, distally narrowly winged, white arachnoid-puberulent; leaf blade ovate-cordate, triangular-cordate, or suborbicular, 2.5-12 × 4-15 cm, thin, glabrous, pinnately veined, base shallowly cordate or cordate, margin regularly denticulate, apex rounded or acute; basal lobes triangular. Middle stem leaves shortly petiolate, base enlarged sheathed; leaf blade cordate or ovate-cordate, 2-7 × 4-7 cm. Distalmost stem leaves sessile, lanceolate. Synflorescence racemose, 12-26 cm, lax; leaflike bracts ovate, to 25 × ca. 8 mm, smaller distally, membranous, with prominent reticulate veins on both surfaces, margin denticulate, apex acuminate; peduncles 5-8 mm, slender, white arachnoid-puberulent. Capitula numerous; supplementary bracts narrowly ovate or lanceolate, as long as involucre, membranous, margin denticulate or entire. Involucre campanulate, 6-8 × 5-6 mm, outside white arachnoid-puberulent; phyllaries 7-9, in 2 rows, oblong, 2-3 mm wide, brown ciliate, apex triangular; inner phyllaries broadly membranous at margin. Ray florets 5 or 6, yellow; lamina oblong, 2-3 × ca. 1 mm; tube ca. 4 mm, slender. Tubular florets numerous, 7-8 mm; tube 2-3 mm. Pappus white, as long as tubular corolla. Fl. Jul-Sep. 2n = 58.
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