From July to late October the Hylocereus blooms white flowers 10-12 inches in width, the flowers appear at dusk but only last one night. From these flowers comes a large oval shaped fruit that can weigh up to 2 pounds. The fruit has a tough outer pink skin with overlapping scales.  The interior of the fruit is white and fleshy with many edible seeds.

Hylocereus undatus is a species of Cactaceae that is one of the most cultivated species in the genus. Pitahaya or Dragonfruit is used as an ornamental vine or a fruit crop.