Common St. Johnswort

Hypericum perforatum
Family Name:	Clusiaceae
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