Helianthus divaricatus, commonly known as the rough sunflower, woodland sunflower or rough woodland sunflower, is a North American species perennial herb in the composite family. It is native to central and eastern North America, from Ontario and Quebec in the north, south to Florida and Louisiana and west to Oklahoma and Iowa. Helanthus divaricatus commonly occurs in dry, relatively open sites. The showy yellow flowers emerge in summer through early fall.