Purple Star thistle

Purple starthistle is native to the Mediterranean region, southern Europe, and northern Africa. It was accidentally introduced to North America early this century, and has since become a widespread problem throughout California, particularly in Solano, Napa, Sonoma, and Marin Counties. Spotty distributions range from Humboldt County in the north to San Diego County in the south. Purple starthistle is present in Idaho, New Mexico, Arizona, Washington, and Oregon where it is established but not yet a serious problem.