Their purple flowers have dark mottled spots and support ... Unlike other thistle plants that establish deep taproots, the Canada thistle (Cirsium arvense) relies on a dense network of lateral ...

or lavender-colored flowers with flat bracts and pointed tips that bloom in June seed are fluffy, white tufts of hair that are wind dispersed Note: Another key characteristic of Canada thistle is the ...

Canada, bull, and musk thistles are three of the most problematic thistle weeds, as they can quickly take over a garden or ...

and covered in spines often found with multiple flowers per stem wind dispersed seeds carried by clusters of cotton-like fuzz Note: European marsh thistle is distinguished from Canada thistle by ...