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Perennial 3–10 dm, commonly stoloniferous, sparsely to moderately hairy, seldom densely hirsute; lower lvs lanceolate to cordate, long-petiolate, the others similar or gradually reduced, short-petiolate or sessile; heads commonly long-pedunculate, the hemispheric or ovoid disk dark purple or brown, 10–18 mm wide; rays 8–21, yellow to orange; receptacular bracts obtuse or acute, smooth or ± ciliolate-margined, rarely with a few appressed hairs on the back; pappus an inconspicuous low crown; 2n=38, 76. Chiefly in woods or moist places; Pa. to Mich., Ill., and s. Mo., s. to Fla. and Tex., and occasionally adventive elsewhere, as in Conn. July–Oct. Three morphologically and geographically overlapping regional vars. that seem sharply distinct at some points of contact:
