There are three basic types of cherry: sweet, semi-sweet and sour. The cherries that you generally find in shops are sweet or semi-sweet dessert cherries and they can be red, black or pale-skinned (sometimes referred to as white cherries). Some are plump and tender, others have a firmer flesh.
Sour cherries are red and the best known is the morello cherry, which has a strong acidic flavor. Morello cherries are suitable only for cooking and can be poached, used for sweet and savory pies, added to desserts, savory dishes, or made into preserves. Dessert cherries can also be used for cooking but will not have the same deep cherry flavor as morello cherries.
** Asian Recipes