Dipsacus is a genus of flowering plants in the family Dipsacaceae, commonly known as teasels. The most common species is the Common Teasel (Dipsacus fullonum), which is native to Europe, western Asia, and northwestern Africa. It has been introduced to North America and other parts of the world as an ornamental plant or for use in traditional medicine. Teasels are characterized by their spiny stems and flower heads, which are used to make fabrics and other materials. They are also used as a food source for some birds.