Helianthus pauciflorus, called the stiff sunflower, is a North American plant species in the sunflower family. It is widespread across the Great Plains, the Rocky Mountains, and the Great Lakes region, and naturalized in scattered locations in the eastern United States and in much of southern Canada (from Alberta to Nova Scotia). Hybrids between H. pauciflorus and H. tuberosus (Jerusalem artichoke) are known as H. × laetiflorus. The name H. laetiflorus has also been used as a synonym of H. pauciflorus.