Herbs, perennial, rhizomatous. Stem solitary, erect, to 120 cm tall, branching into synflorescence, sparsely puberulent when young. Leaves petiolate; basal and lower stem leaves withered by anthesis; median stem leaf petiole 3-6 cm, narrowly winged; blade ovate-triangular or triangular, 10-14 × 8-13 cm, membranous or thinly papery, abaxially sparsely puberulent, adaxially glabrous, base broadly cuneate and attenuate into petiole, margin irregularly dentate, apex acuminate. Upper leaves smaller, subsessile, ovate-lanceolate or lanceolate, 9-11 × 1.5-3.5 cm, base cuneate-attenuate, apex acuminate. Capitula radiate, numerous, arranged in rather crowded terminal compound corymbs; peduncles 7-15 mm, slender, puberulent, often bracteate; bracteoles 2 or 3, linear, ca. 5 mm. Involucres subcylindric, 6-7 × 2-3 mm, calyculate; bracts of calyculus 2 or 3, linear, ca. 1/2 as long as involucre; phyllaries 8, linear-oblong, 6-7 × 1-1.5 mm, subleathery, glabrous, margin scarious, apically acute, blackish, and ciliate. Ray florets 3; corolla tube 4-5 mm, sparsely puberulent in upper part; lamina yellow, linear, ca. 15 × 1 mm, 4-veined, apically deeply 2-or 3-lobed. Disk florets 8 or 9; corolla yellow, ca. 8.5 mm, with ca. 4.5 mm tube and funnelform limb; lobes oblong-lanceolate, ca. 1.7 mm, apically acute. Anthers ca. 2.3 mm, basally shortly obtuse-auriculate, appendages ovate; antheropodia somewhat expanded toward base. Style branches ca. 1 mm. Achenes ca. 2.5 mm, glabrous. Pappus white, ca. 6 mm. Fl. Aug-Sep.
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