The citron melon, also called Citrullus lanatus var. citroides and Citrullus amarus, fodder melon, preserving melon, red-seeded citron, jam melon, stock melon, Kalahari melon or tsamma melon, is a relative of the watermelon It is in the family Cucurbitaceae which consists of various squashes, melons, and gourds. Wikipedia