Hylocereus is best known for producing exotic, large fruits, known as Dragon Fruit. While all species of the genus have varying edible fruits, that of H. undatus is the primary species found in grocery stores and street markets - particularly in Asia. These fruits are slightly larger than an orange, with red skin accented by green scales.
Nearly 20 species of Hylocereus are recognized by most and they can be found naturally occurring from Southern Mexico down throughout Central America and into Northern South America. As the name implies, these plants grow primarily in the forested areas of this distribution. Those species grown for their fruits are grown on farms in other parts of the world, especially tropical Asia.