Eupatorium hyssopifolium var. calcaratum Fernald & B. G. Schubert; E. lecheifolium Greene

Leaves mostly linear, 2–5 mm wide, margins usually entire or obscurely serrulate. 2n = 20, 30.

Flowering Aug–Oct. Dry, open, disturbed sites, along roadsides; 10–200+ m; Ala., Ark., Conn., Del., Fla., Ga., Ill., Ky., La., Md., Mass., Miss., Mo., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Tex., Va., W.Va., Wis.