Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Noxious weed that thrives in a variety of habitats.
Origin: Introduced from Eurasia
Conservation Status: Not of concern
Dioecious, mostly glabrous perennial from deep rhizomes, 3-15 dm. tall.
Leaves lanceolate or oblong, up to 2 dm. long, reduced upward, pinnatifid or occasionally merely lobed or toothed, weakly spiny.
Heads several; involucres 1-2 cm. high, the outer bracts tipped with weak, short spines; pappus of the pistillate heads longer than the corollas, that of the staminate heads shorter than the corollas; flowers pink-purple or occasionally white.
Achenes glabrous, about 4 mm. long.