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Washington State Weeds


Common St. Johnswort

Hypericum perforatum

Family Name:


Class: C
Other Names: St. John's wort, klamath weed, common goatweed and tipton weed
 Why is it a noxious weed? St. Johnswort spreads easily to new sites. Over-exposure to St. Johnswort can cause various animal health problems including severe skin lesions and necrosis when their skin becomes hypersensitive to sunlight.

More Information:




Visit Washington State Noxious Weed Control Board Here