*Hypericum perforatum Linnaeus. European St. John’s-wort, Klamath-weed. Phen: Jun-Sep. Hab: Fields, pastures, roadsides, woodland borders. Dist: Native of Europe. See Duncan (1985) for documentation for GA.

Origin/Endemic status: Europe

Synonymy: = Ar, C, F, G, GrPl, Il, K1, K3, K4, Mi, Mo2, NcTx, Pa, RAB, S, S13, Tat, Tn, Va, W, WV, Adams (1973); = Hypericum perforatum L. ssp. perforatum – FNA6, NE, NY, Robson (2006)

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU
• Eastern Mountains and Piedmont: FAC
• Great Plains: UPL
• Midwest: FACU
• Northcentral & Northeast: UPL

Heliophily: 9