The montmorency cherry is a variety of sour cherry (prunus cerasus) grown in europe, canada, and the united states, particularly in the grand traverse bay region of northwest michigan and in door county, wisconsin. montmorency cherries are part of the lighter-red amarelle cultivar of sour cherries, rather than the darker-red morello cultivar. michigan produces over 90,000 tons of montmorency cherries each year.

Source: Wikipedia