Eupatorium perfoliatum Linnaeus. Boneset. Phen: Aug-Oct. Hab: Marshes, swamps, bogs, wet pastures, and other wet habitats. Dist: NS west to MB, south to n. peninsular FL and TX.

Origin/Endemic status: Native

Synonymy: = Ar, Fl7, FNA21, GrPl, GW2, Il, K3, K4, Mi, NcTx, NE, NY, Oh3, Pa, RAB, Tn, Tx, Va, W, WH3, WV; = Eupatorium perfoliatum L. var. perfoliatum – C, G, K1, S, SE1; > Eupatorium chapmanii Small – S; > Eupatorium cuneatum Engelm. – S, (actually a hybrid); > Eupatorium perfoliatum L. var. colpophilum Fernald & Griscom – F; > Eupatorium perfoliatum L. var. perfoliatum – F

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