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Species:
Hypericum perforatum
Common Name(s):
common St. Johnswort, St. John's wort, Klamath weed
Habitats Impacted:
rangeland, disturbed/waste areas
Regions likely to be Impacted:
NE, NW
Present in Neighboring States?
AR, CO, KS, LA, MO, NM, TX
Currently known from Oklahoma?
Yes
Steve Dewey, Utah State University, Bugwood.org
More Images:
What you should know!
Crowds out native species. Toxic to livestock. has been shown to cause hyper photosensitivity. A seed or hay contaminant. Used medicinally.
Management information
Additional Online Resources for:
Hypericum perforatum
Species Overview
Distribution Map
iNaturalist Records in Oklahoma
iNaturalist Records in North America
Herbarium Records
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