Rhizomes 10-15 mm in diam., with numerous fibrous roots. Stem solitary, erect, 80-100 cm tall, striate, long naked below, sparsely glandular shortly pubescent, densely so in upper part. Leaves crowded, long petiolate; lower leaves fallen at anthesis; median leaf petioles not winged, 6-10 cm, expanded at base but not amplexicaul, sparsely or densely glandular shortly pubescent, sometimes with axillary ovoid scale buds; blade abaxially pale green or gray-green, adaxially dark green, broadly triangular-hastate or ovate-triangular, 10-15 × 12-15 cm, thinly papery, abaxially densely glandular shortly pubescent on veins, adaxially adpressed hispidulous, basally 3-5-veined, lateral veins upward divaricate and reticulate, base broadly cordate or hastate, apex long acuminate or caudate; lateral lobes broadly triangular, margin with long mucronulate teeth. Upper leaves smaller, similar to median leaves, or ovate-triangular, shortly petiolate; uppermost narrowly triangular to lanceolate, small. Capitula numerous apically and in upper leaf axils in lateral racemes or panicles; rachis and peduncles 1-2 mm or capitula subsessile, densely capitate stipitate glandular hairy; peduncles with 1 or 2 linear bractlets. Involucres cylindric or narrowly campanulate, 10-11 × 3-4 mm; phyllaries 5, oblong-lanceolate, ca. 1.5 mm wide, outside sparsely or densely glandular puberulent, margin ciliate, narrowly scarious, apically rather acute or obtuse. Florets 5, often longer than involucres; corolla yellow, 8-9 mm, with ca. 4 mm tube and campanulate limb; lobes lanceolate. Anthers exserted from corolla, basally caudate. Style branches excurved, truncate, papillose. Achenes brown, cylindric, 3-4 mm, glabrous, ribbed. Pappus brown, ca. 8 mm. Fl. Sep.
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