Rhizomes procumbent, robust. Stem solitary, erect, 50-120 cm tall, often naked below, striate, sparsely arachnoid, later glabrescent, ferruginous-brown glandular, shortly pubescent. Leaves long petiolate; petiole 5-8 cm, basally subamplexicaul; blade broadly ovate or ovate-rhombic, membranous, abaxially sparsely arachnoid, later glabrescent, adaxially hispidulous, base truncate or slightly cordate, cuneately narrowed into winged petiole, apex acute or shortly acute, teeth densely mucronulate. Middle stem leaves 10-13 × 10-12 cm, basally 3-veined, lateral veins furcately branched, veins abaxially prominent. Upper leaves shortly petiolate, smaller. Capitula numerous, arranged in terminal lax panicles; peduncles slender, sparsely glandular shortly pubescent, with 1-3 linear bractlets. Involucres cylindric, 8-10 × ca. 3 mm; phyllaries 5, linear-lanceolate, 8-9 × 1.5-2 mm, glabrous or subglabrous, margin scabrous, apex obtuse, puberulent. Florets 5; corolla yellow, ca. 8 mm, with slender ca. 3 mm tube, broadly tubular; limb lobes lanceolate, 1.5-2 mm. Anthers exserted from corolla, basally caudate. Style branches excurved, truncate, papillose. Achenes cylindric, ca. 6 mm, glabrous, ribbed. Pappus white, shorter than corolla. Fl. and fr. Aug-Sep.
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