Herbs, perennial, rhizomatous, stoloniferous. Stem solitary, erect, 60-70 cm tall, not branched below synflorescence, sparsely puberulent when young, soon glabrous. Basal and stolon leaves long petiolate; petiole 3.5-12 cm, slender, basally expanded but not auriculate; blade deltoid, small, 2-3 × 2-3 cm, membranous, abaxially glabrous, adaxially sparsely puberulent or glabrous, base subtruncate or weakly cordate, margin irregularly sinuate-dentate, apex acuminate. Basal and lower stem leaves withered by anthesis; lower stem leaves with narrowly winged petioles, basally subauriculate. Median stem leaves similar but larger; petiole 3.5-6 cm, narrowly winged, basally auriculate; blade 5-15 × 4-8 cm, base subtruncate or hastate, pinnately veined. Upper leaves smaller, with shorter, broadly winged petioles, basally dilated into conspicuous rounded subamplexicaul auricles. Uppermost leaves sessile, lanceolate, basally cordate-semiamplexicaul, apically caudate-acuminate. Capitula at first erect, later nodding, discoid, numerous, arranged in dense long-stalked terminal and upper axillary rounded corymbs; peduncles 2-3 mm, fulvous puberulent; bracteoles 2 or 3, filiform. Involucres cylindric, 6-7 × 1.5-2 mm, calyculate; bracts of calyculus 2 or 3, minute; phyllaries 5, linear, ca. 1 mm wide, subleathery, glabrous, margin narrowly membranous, apically obtuse and black. Disk florets 5 or 6, corolla yellow, 6-7 mm, with 2-2.5 mm tube and funnelform limb; lobes ovate-triangular, 0.8-1 mm, apically acute, papillose. Anthers 2-2.5 mm, basally obtusely subauriculate, appendages lanceolate; antheropodia rather long, basally gradually dilated. Style branches ca. 0.7 mm. Achenes (immature) cylindric, ca. 1.5 mm, glabrous. Pappus deciduous, white, 5-6 mm. Fl. Sep.
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