Hypericum tetrapterum Fries Engl.: square-stalked St John's-wort, St. Peter's-wort. Deu.: Geflügeltes Johanniskraut, Flügel-Johanniskraut. Sven.: kärrjohannesört, fyreggad johannesört. Dan.: vinget perikon. Fran.: millepertuis à quatre ailes. Bot. syn.: Hypericum acutum Moench, Hypericum quadrangulum L.
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