Verbena canadensis

Verbena canadensis (syn. Glandularia canadensis), commonly known as rose mock vervain, rose verbena, clump verbena or rose vervain is a perennial herbaceous flowering plant in the verbena family (Verbenaceae) with showy pink to purple flowers. It is native to the eastern and south-central areas of the United States. This species is widely cultivated as an ornamental, and naturalized populations have been established outside its native range, such as in the northeastern U.S....read more on Wikipedia.