From the cactus family, specifically the genus Hylocereus or sweet pitayas, dragonfruit is football-shaped and has a leathery, leafy skin that is deep red or pink in color. It comes in three varieties, red flesh, white flesh and yellow flesh, all of which are embedded with hundreds of black seeds and have a mild, sweet taste. The best-tasting variety is the one with red flesh, which is succulent when eaten.