Herbs, perennial, 70-150 cm tall; rhizome short, thickened. Stems erect, glabrous. Leaves reduced upward, abaxially pale green, flat, 3-or 5-veined, margin and both surfaces scabrous, abaxially less so, eglandular; basal leaves withered by anthesis, petiole 10-15 cm, blade ovate, 9-15 × 6-15 cm, base cordate, margin serrate, teeth mucronate, apex acute; middle cauline leaves shortly petiolate, petiole broadly winged; blade ovate to narrowly ovate, base truncate to rounded; upper cauline leaves broadly winged shortly petiolate to sessile, lanceolate. Capitula in corymbiform synflorescences, 1.8-2.4 cm in diam.; peduncles 6-30 mm, sparsely to moderately scabridulous, eglandular or stipitate glandular, bracts linear. Involucre campanulate, 5-6 mm in diam.; phyllaries 3-seriate, strongly unequal, green area narrow; outer phyllaries ca. 1.5 × 1-1.5 mm, abaxially glabrous, base of outer thickened, margin broadly scarious, sometimes purplish apically, ciliate, apex obtuse, sometimes acute. Ray florets 4-9, white, 6-10 mm, tube 3-3.5 mm, lamina abaxially glabrous, eglandular; disk florets 4.5-5 mm, limb abruptly enlarged, campanulate, ca. 3 mm, sparsely shortly hairy at tube-limb junction, lobes spreading, triangular, 1.5-2 mm. Achenes obovoid, sometimes slightly compressed, 3-4 mm, glabrous, 3-7-ribbed. Pappus of many sordid-white, barbellate bristles, 3.5-4.2 mm (slightly shorter than disk florets); outer bristles short (50% or less of inner length), slender; inner bristles length 80-90% of innermost bristles, tapering; innermost bristles longest, clavate. Fl. Jun-Oct, fr. Aug-Oct. 2n = 18.
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A robust herb. It keeps growing from year to year. It grows 1-1.5 m high. The stems are smooth and 3-7 mm across. The stems develop from buds on the short rhizomes or underground stems. The leaves are rough to the touch and have teeth along the edge. The leaves at the base are triangle shaped and 5-12 cm long by 3-12 cm wide. The leaf stalk is longer than the blade. These leaves die off. The leaves on the stem are oval or heart shaped and 8-14 cm long by 6-14 cm wide. The upper leaves get smaller. The flowers are in heads that form loose clusters at the top of the plant.
Can be grown by divisions or seedlings. Seeds needs stratification.
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