Violet blossoms with aromatic foliage. A familiar sight on the prairie. Native to most of North America, its historical medicinal applications include poultices for boils and lacerations, as well as tea infusions for headaches, indigestion and colds and flu. Wild bergamot is a favorite of butterflies, bees, and hummingbirds. Its species name, fistulosa, refers to the tube-like structure of its blossoms, which appear from July through September.