Farmland, roadsides, sand dunes, towns, walls, wasteland.
Many-flowered. Small tubular 4-lobed yellow disc florets, yellow-green bracts that are only slightly downy, very short white rays.
Slender, simple, unstalked, linear leaves. Upper leaves have toothed margins and lower leaves have smooth margins.
Bitterweed, Blood Stanch, Butterweed, Canadian Horseweed, Colt's Tail, Cow's Tail, Fireweed, Hogweed, Horse Tongue, Horseweed, Mare's Tail, Mule Tail, Prideweed.