Toxicodendron radicans (Linnaeus) Kuntze var. negundo (Greene) Reveal. Midwestern Poison Ivy. Phen: Late Apr-May; Aug-Oct. Hab: In a wide range of habitats, including mesic forests, rock outcrops, open areas, and disturbed ground. Dist: NY west to MI, MN, and NE, south to sw. VA, KY, AR, and TX, almost entirely in or west of the Appalachians.

Origin/Endemic status: Native

Synonymy: = C, Il, Va; = n/a – RAB; = Rhus radicans L. var. vulgaris (Michx.) DC. – F, G; = Toxicodendron negundo Greene – Greene (1905); = Toxicodendron radicans (L.) Kuntze ssp. negundo (Greene) Gillis – GrPl, K1, K3, K4, Mo2, NcTx, NE, NY, Gillis (1971); < Toxicodendron radicans (L.) Kuntze – Ar, Mi, Ok, Pa, S, Tn; < Toxicodendron radicans (L.) Kuntze var. radicans – NeUS

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
• Great Plains: FACU (taxonomic split from wetland indicator species)
• Midwest: FAC (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily: 5