Wintergreen (Gaultheria procumbens) (aromatic wintergreen, eastern teaberry, checkerberry, boxberry, gaultheria or American wintergreen) is a species of Gaultheria native to northeastern North America from Newfoundland west to southeastern Manitoba, and south to Alabama. It is a member of the Ericaceae (heath family). Methyl salicylate, the main chemical constituent of the oil, is not present in the plant until formed by enzymatic action from a glycoside within the leaves as they are macerated in warm water. Intense sweet-woody almost fruity odor. Flashpoint 158 F.