Herbs, perennial; rhizomes robust. Stems erect, slender, to 100 cm tall, simple, glabrous, laxly leaved. Leaves elliptic or lanceolate, both surfaces glabrous, or sparsely ciliate, lower cauline narrowly petiolate, upper cauline gradually smaller. Capitula 7-12 mm, numerous, in terminal corymbs, several corymbs arranged in racemiform synflorescences to 35 cm, branches erect, inserted around stem, capitula attached around branch. Involucre campanulate, 4-6 mm; phyllaries 3-or 4-seriate, elliptic or oblanceolate, 4-6 mm, rounded or obtuse. Ray florets ca. 5 mm. Achenes ca. 2 mm, glabrous. Pappus inner (longest) bristles weakly to moderately clavate. Fl. and fr. Aug-Oct.
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