Tricarpellary, syncarpous superior ovary occurs in
Allium
Liliaceae or lily family is an economically important family of monocotyledonous flowering plants. Allium is a genus of species of flowering plants belonging to family Liliaceae. In Liliaceae, the gynoecium is tricarpellary, syncarpous (carpels fuse), ovary superior (ovary attached to the receptacle above the floral parts), trilocular with two ovules, axile placentation. So, the correct answer is 'Allium'.