Annual, glabrous or nearly so, erect, simple or but little branched, 9–18 in. high. Lowest leaves subrotund or oval, 1/2–1 in. long, dentate, narrowed into a petiole of 1/3–1 1/4 in.; lower leaves pinnatipartite, sublyrate, petiolate, 1 1/4–2 1/4 in. long, including the petiole; upper leaves rather smaller, sessile, pinnatipartite, with linear or oblong toothed or entire lobes. Capitula campanulate, about 1/4 in. long, on pedicels of 1/4–1 in., in rather small corymbose cymes of 1–2 in. diameter. Calyculus of short lanceolate-acuminate bracts. Involucral bracts linear, about 3-nerved, with a lanceolate tip and a narrow scarious margin, equalling the florets. Ligule of the ray-florets recurved, very short. Achenes costate, setulose on the ribs; setulæ short, thick.
