Teasel, the common name for a family of herbs. The family is made up of about 150 species, all of which are native to the Old World. Of the 10 genera, one is commonly called the teasel genus. The most important species of the teasel genus, which is made up of about a dozen species, is fuller's teasel. The flower heads of fuller's teasel have numerous hard, spiny projections; they are used in the textile industry to raise the nap on woolen fabrics. Fuller's teasel is raised commercially in a few areas of the United States.
The teasel family is Dipsacaceae. The teasel genus is Dipsacus. Fuller's teasel is D.fullonum.Teasel flower heads have numerous hard, spiny projections.