Cunila origanoides

Cunila origanoides, with the common names stone mint, frost mint, dittany, and American dittany, is a perennial late-summer-flowering subshrub with small purple flowers that is native to the central and eastern United States. It belongs to the mint family (Lamiaceae) and is the only species in the genus Cunila native to the United States. It grows in habitats such as dry forests and the thin soil around rock outcrops. This species has historically been cultivated for use as a medicinal herb, tea, and ornamental plant....read more on Wikipedia.