Common St Johnswort (Hypericum perforatum)

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Habitat: Disturbed sites and open areas
Native/Non-native: Non-native to Eastern North America, Native of Europe
In some areas in the world, it is grown commercially. In other areas, it is considered as a noxious weed. In North America, it competes with native plants
Hypericum refers to the chemical "hypericin"; perforatum means "Punctured holes "