Bull thistle (Cirsium vulgare), also sometimes called spear thistle, Fuller's thistle, and lance-leafed thistle, is a biennial weed found in ... and North Africa, the plant was accidentally ...

Canada thistle (Cirsium arvense) is a particularly aggressive invasive plant. Despite its name, Canada thistle is not a plant native to Canada. This noxious weed likely came over with early ...

AGRICULTURAL AND FARM NEWS Wild parsnip (Pastinaca sativa) continues to spread throughout Minnesota. This plant is considered an invasive species and the Minnesota Department of Agriculture ...