Herbs, perennial; rhizome thick, woody. Stems erect, 17-100 cm tall, sparsely (to moderately above) stipitate glandular, sparsely and irregularly arachnoid (more regularly so above), or glabrate. Leaves: basal and lower cauline petiole relatively short, 3-8 cm, narrowly winged, blade obovate or elliptic, 6-20 × 2.5-6 cm, surfaces sparsely to moderately short-stipitate glandular, abaxial midvein sparsely arachnoid, base attenuate, margin irregularly, shallowly dentate to serrate, teeth mucronulate, apex obtuse or acute; mid cauline narrowly elliptic to lanceolate, base auriculate-clasping; upper cauline reduced upward, entire. Capitula (5-)10-27 in corymbiform synflorescences. Involucre 2-3.5 cm in diam.; phyllaries 3-or 4-seriate, linear-lanceolate, unequal, outer shorter than inner, papery, surfaces densely short-stipitate glandular, ± arachnoid, margin apically densely arachnoid ciliate, that of inner narrowly to moderately scarious, apex acuminate to caudate, tip often dark. Ray florets yellow, lamina narrowly oblong, 9-13 × 1.8-2.5 mm, distinctly exceeding involucre; inner tubular 2-or 3-seriate, yellow, 2-4 mm, obliquely truncate; disk florets numerous, 4-4.5 mm, lobes glandular (mostly at apex). Achenes brown, narrowly oblong, 4-6 mm, sparsely to moderately strigose, particularly distally, pale 8-10-veined. Pappus of white or whitish bristles 4-5.5 mm, those of disk fewer. Fl. Jul-Aug.
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