Pepo is a type of plant that includes four different species: MELON, GOURD, PUMPKIN, and SQUASH. All of these plants are members of the Cucurbitaceae family and have a thick outer rind and edible flesh. Melons are round or oval fruits with a sweet, juicy flesh, gourds are hard-shelled fruits with a bitter taste, pumpkins are large, round fruits with a sweet flavor, and SQUASH are oblong fruits with a mild flavor. All of these plants are popularly used in cooking and baking.