Leaves: Mostly alternate, 0-2 mm. petioles, elliptic, lance-linear, or rhombic in shape, 10-40 mm. long, 5-15 mm. wide, cuneate base, margins irregularly toothed to laciniate.
Stems: Brownish gray in color with young twigs coated in light woolly fibers and older branches bare.
Flowers: Inflorescence has a few clustered male flower heads next to several single-flowered, saucer-shaped to shallowly cup-shaped, pistillate flower heads; 4-8 mm. in diameter.
Fruit and seeds: Green burr with long, silky white hairs, several hair-tufted sharp spines, 1 cm. long.
Habitat: Native to western North America. Can be found growing in the plains and mountain ridges up to 5,600 ft in elevation.
Reproduction: By seed.
Credits: The information provided in this factsheet was gathered from Flora of North America - eFloras
Individual species images that appear with a number in a black box are courtesy of the Bugwood.org network (http://www.invasive.org). Individual photo author credits may not be included due to the small display size of the images and subsequent difficulty of reading the provided text. All other images appear courtesy of Google (http://images.google.com).