An aggressive and irritating weed most gardeners already know. Grows very tall, with large and very wide leaves (10 by 12 in) with a velvety texture. Flowers come in small clusters on thin branches on the upper half of the plant, and are made up of a ball-shaped greenish 'burr' and a small tuft of pinkish-white stamens. These burrs contain the seeds, and eventually turn brown. They either fall off the plant or come off when touched, violently hooking themselves to animal coats and clothing in order to disperse themselves.