Hypericum perforatum (weed)
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Hypericum perforatum (weed) L. - (common St. Johnswort)
This herb is native to Europe and Asia but invasive in several other regions like North America and Australia where it has been introduced as a medicinal plant. It can be a problem in some crops and is poisonous to livestock in pastures. Further, it often replaces native plants.
For details see the respective page in Wikipedia.
- Other images of Hypericum perforatum (weed) (Wikimedia Commons and IPM Images - click to enlarge)
foliage
seeds
infestation
