Hylocereus

Several species previously placed in the genus have large edible fruits, which are known as pitayas, pitahayas or dragonfruits.The species previously placed in the genus Hylocereus grow hanging, climbing or epiphytic.They are freely branched, shrubby plants that form aerial roots and become very large with a height of 10 m or more.[2] A 2011 study of the molecular phylogeny of the Cactaceae concluded that neither the tribe nor the genus was monophyletic (i.e. neither comprised all the descendants of a common ancestor).[3] This result was confirmed in a larger study in 2017, and all the species of Hylocereus were transferred to Selenicereus.
Selenicereus monacanthus , formerly Hylocereus monacanthus
Selenicereus monacanthusspeciesfruitspitayasmolecular phylogeneticSelenicereusInternational Organization for Succulent Plant StudyHylocereeaemolecular phylogenymonophyleticSelenicereus costaricensisSelenicereus megalanthusSelenicereus setaceusSelenicereus undatusEpiphyllumWikidataiNaturalistOpen Tree of LifeTropicos