Erect perennial herb, about 3 ft. high, glabrous below, usually scabrid-pubescent above. Leaves pinnatisect, usually scabrid-hispid below, ovate in outline, 1 1/2–4 1/2 in. long, sessile or petiolate, segments 3–4 on each side, opposite, 1/4–2 1/2 in. long, lanceolate or linear, more or less toothed or sub-pinnatipartite, the terminal one the greatest. Capitula hemispherical, about 1/2 in. diam., on pedicels of 1/2 to 4 1/2 in., in a lax corymbose cyme. Outer involucral bracts linear, glabrous, equal, 1/5– 3/8 in. long, acute, margins minutely scabrous; inner bracts broader, coloured, mostly hispid, exceeding or about equalling the outer. “Achenes compressed almost 1/6 in. long, convex on the back, flat and hairy on the face.” Aristæ filiform, shorter than the achene.
