Hylocereus ocamponis is a species of cactus that belongs to the family Cactaceae. It is a climbing cactus that produces large, fragrant flowers that bloom at night. The flowers are followed by edible fruit that is commonly known as dragon fruit. The stems of the plant are thick and green, with prominent ribs that are lined with small spines. The plant has a woody base and can grow up to 10 meters long.