Watermelon is a large ground-dwelling melon that grows on vines. Watermelons are members of the Cucurbitaceae family, making them related to squash, pumpkins and gourds, cantaloupe, and cucumbers. Watermelons vary in shape and size, with flesh colors ranging from yellow, to orange or dark pink. Most commonly, the fruit is round or oval in shape, with a smooth, thick outer rind that green and yellow with jagged stripes across its length. The texture of its flesh tender and very juicy, with a sweet and mild flavor.