Tart cherry, or sour cherry, is a member of the Rosaceae family. Sour cherries can be eaten as a food and are also used as a flavoring agent. Orally, sour cherry has been used for arthritis and digestion. Both the gruit and the stem of can be used. Sour cherry contains vitamin A, vitamin C, alpha-linolenic acid, antioxidants, and traces of vitamin E, beta-carotene, and folacin thiamine.