Common teasel (Dipsacus fullonum) is a biennial weed native to Europe and Northern Africa. It was originally introduced into the U.S. in the 1700’s. It invades rights-of-way, pastures, riparian areas, ...

If you’ve driven along any interstates or highways in Illinois, there’s a good chance you’ve seen tall plants with spiky flower heads. Teasels have become an increasingly common site across Illinois.