Leaves mostly lance-linear to lanceolate, 5-15 mm wide, margins usually laciniately toothed. 2n = 30, 40. Flowering Aug-Oct. Dry, open fields; 10-200+ m; Ala., Ark., Conn., Del., Fla., Ga., Ky., La., Md., Miss., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Va., W.Va.