Ageratina aromatica (Linnaeus) Spach. Phen: Late Aug-Oct. Hab: Woodlands and forests, usually xeric, and often fire-maintained, longleaf pine sandhills, also woodland edges. Dist: MA, NY, and OH, south to ne. FL, Panhandle FL, and e. LA (Florida parishes).
Origin/Endemic status: Native
Taxonomy Comments: Two varieties have been delineated, both of them occurring in our area. Var. incisa (A. Gray) C.F. Reed is described as differing from var. aromatica in having the leaves cuneate (vs. truncate to rounded), acuminate (vs. acute), sharply toothed (vs. bluntly toothed, thin in texture (vs. thick), and the petioles slender and 0.5-2 cm long (vs. less slender and 0.1-1.5 cm). It is supposed to be Southeastern in range, from se. VA south to FL, on the Coastal Plain. The validity of this variety needs further assessment.
Synonymy: = Fl7, FNA21, K3, K4, NE, NY, Pa, Tn, Va, WH3, Clewell & Wooten (1971); = Eupatorium aromaticum L. – C, G, Oh3, RAB, SE1, W; > Ageratina aromatica (L.) Spach var. aromatica – K1; > Ageratina aromatica (L.) Spach var. incisa (Gray) C.F.Reed – K1; > Eupatorium aromaticum L. – S; > Eupatorium aromaticum L. var. aromaticum – F; > Eupatorium aromaticum L. var. incisum A.Gray – F; > Eupatorium latidens Small – S