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Browsing by Subject "Hypericum perforatum -- Control"

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Browsing by Subject "Hypericum perforatum -- Control"

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  • St. Johnswort : scientific name, Hypericum perforatum : common names, Klamathweed, goatweed 
    Oregon State University. Extension Service.; Zimmerman, Martin (Martin Joseph) (Corvallis, Or. : Extension Service, Oregon State University, 1963)
  • St. Johnswort, Hypericum perforatum L. 
    Fitzsimmons, Jim P.; Burrill, L. C.; Oregon State University. Extension Service; Washington State University. Cooperative Extension; University of Idaho. Cooperative Extension System; United States. Dept. of Agriculture ([Corvallis, Or.] : Oregon State University Extension Service ; [Olympia, Wash.] : Washington State University Cooperative Extension ; [Moscow, Idaho] : University of Idaho Cooperative Extension System ; [Washington, D.C.] : U.S. Dept. of Agriculture, 1993-03)
    St. Johnswort (Hypericum perforatum), also called Klamath weed and goatweed, was introduced from Europe and was found in California about 1900. It was a major pasture weed west of the Cascade mountains from Tacom ...

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