Root round, thick, solid, often branching, the autumn tufts of leaves large and spreading. Stem one to three feet tall, stout, hairy, with few branches, very leafy. Leaves oblong lance-shaped, sessile or partly clasping, softly hairy, green on both sides, pinnatifid, the lobes short, triangular, very prickly-toothed. Heads purple, pale lilac, or sometimes nearly white, very large, often three inches broad, very sweet-scented; bumblebees are nearly always probing them for nectar, and in the writer's childhood it was a custom of country children to strip away the bracts, pull the florets from the receptacle, and eat the sugary nectaries like taffy; the heads are solitary, terminal,, usually subtended by involucrate clusters of small leaves, the outer bracts of the involucre sometimes slightly glutinous on the back, prickly-tipped, the inner ones unarmed and very slender. (Fig. 355.) Means of control the same as for the Common Thistle.