Cirsium altissimum (Linnaeus) Sprengel. Tall Thistle. Phen: Sep-Nov. Hab: Pastures, woodlands, thickets. Dist: MA west to ND, south to Panhandle FL (Jackson County) and e. TX.
Origin/Endemic status: Native
Synonymy: = Ar, C, F, Fl7, FNA19, G, GrPl, Il, K1, K3, K4, Mi, NcTx, NE, NY, Oh3, Ok, Pa, S, SE1, Tn, Va, W, WH3; = Carduus altissimus L. – RAB
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