Musk thistle is biennial or sometimes a winter annual ... They are able to penetrate hard soils or even tubers and roots of other plants. Stems are erect and usually 1 to 3 feet tall. Leaf blades are ...

It is known as musk thistle in some countries overseas. The species gets the name "nodding thistle" because of the large seed heads that "nod" over due to their weight, for example, they tend not to ...