Stem herbaceous, subterete or slightly angular, striate, thinly pubescent-tomentose or glabrate, 2–3 ft. Leaves alternate, membranous, ovate or elliptical, acute or finely acuminate, abruptly or gradually attenuate below into the petiole, in the larger leaves acutely unequally incise-dentate or in smaller leaves with short setiform teeth, nearly glabrous or thinly papillose-scabrid above, especially on the reticulation beneath; 5–7 in. long, 1 1/2–4 in. broad; leaves of lateral shoots smaller lanceolate, finely narrowed to each end; petiole 1/2– 3/4 in., gradually dilating above. Capitula 12–15-flowered, campanulate, 1/3 in. diam., on short slender pedicels in terminal and smaller lateral leafy panicles, 1/2– 3/4 ft. wide. Scales of involucre pluriseriate, outer ovate or ovate-elliptical, inner oblong or lanceolate, subacute, mucronate, glabrous or nearly so, pale with greenish tips. Receptacle narrow, flat, areolate. Corolla gradually narrowed. Anther-base obtuse. Achenes glabrous or very minutely scabrid, 10-(8)-costate, some of the ribs occasionally lost, callus-based. Pappus white, duplex, scabrous; inner setæ caducous, outer very short.
