Plants grayish green. Stem erect, to 100 cm tall, 5-8 mm in diam. at base, proximally glabrous, distally and synflorescence white arachnoid-puberulent. Basal leaves petiolate; petiole to 5 cm, glabrous, entirely winged, base sheathed; leaf blade oblong or ovate-lanceolate, rarely elliptic, 8-22 × 4.5-8 cm, glabrous, or initially white pubescent along veins, or puberulent and sometimes shortly yellowish brown pilose, pinnately veined, abaxially with prominent reticulate veins, base cuneate, narrowed into a winged petiole, margin dentate, apex obtuse or acute. Middle to distal stem leaves sessile, ovate-lanceolate to linear, smaller distally, base semiamplexicaul, margin entire or denticulate, apex acuminate. Synflorescence racemose, to 40 cm, clustered; leaflike bracts linear-lanceolate to linear, proximally to 4.5 cm, smaller distally; peduncles 3-7 mm. Capitula numerous; supplementary bracts subulate. Involucre turbinate, 7-10 × ca. 5 mm, outside white pubescent or glabrescent, or puberulent and sometimes shortly yellowish brown pilose; phyllaries 7 or 8, in 2 rows, oblong or lanceolate, ca. 3 mm wide, margin membranous and densely white ciliate, apex acuminate. Ray florets 5 or 6, yellow; lamina linear, 6-8 × 1-1.5 mm, apex obtuse; tube ca. 4 mm. Tubular florets numerous, ca. 7 mm; tube ca. 3 mm. Achenes yellowish, cylindric, 3-5 mm, with prominent ribs. Pappus white, as long as tubular corolla. Fl. and fr. Jul-Aug. 2n = 58*.
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