Common mugwort is an herb native to Europe, Africa and Asia that is now naturalized throughout North America. The herb is known by a variety of common names, such as Cronewort, Felon Herb and Old Uncle Henry. In the Ukraine, the herb is called chornobylnik, which inspired the name of the now abandoned city of Chernobyl because the root word translates to "a place where mugwort grows."

Mugwort is traditionally used in smaller quantities in tea blends. This herb can also trigger allergic reactions in people with sensitivities to other plants in the daisy family.