annual, glabrous or nearly so, erect, branched; stem weak, rib-striate; leaves eared at base, of thin substance, the lower ones petioled, ovate or oblong, coarsely dentate, the upper subsessile, tapering to the base, deeply pinnatifid or pinnatisect, the lobes in 3–4 pair, horizontally patent, subulate, acute, mucronate, quite entire; corymb rather close, pedicels short; inv. glabrous, of 12–15 scales, calycled with a few very slender, setaceo-subulate bracteoles; rays 6–8, shorter than the invol; achenes pubescent. A weak annual, 6–12 inches high or more, with thinly membranous, pale leaves. Leaves 1–1 1/2 inch long, the lower ones 3/4–1 inch wide. Inv. 2 lines long; rays 1 1/2, at length revolute.