Epiphyllum oxypetalum ( Wijayakusuma )

 Epiphyllum oxypetalum ( Wijayakusuma )

Epiphyllum oxypetalum (Dutchman's pipe or queen of the night) is a species of cactus and one of the most cultivated species in the genus. Though it is sometimes referred to as a nightblooming cereus, it is not closely related to any of the species in the tribe Cereeae, such as Selenicereus, that are more commonly known as nightblooming cereus. All Cereus bloom at night and are terrestrial plants; all Epiphyllum are epiphytic.

Flower of Epiphyllum oxypetalum

Epiphyllum oxypetalum

The Scientific classification of  Epiphyllum oxypetalum
Kingdom:     Plantae
(unranked):     Angiosperms
(unranked):     Eudicots
(unranked):     Core eudicots
Order:     Caryophyllales
Family:     Cactaceae
Genus:     Epiphyllum
Species:     E. oxypetalum
Binomial name
Epiphyllum oxypetalum
(DC.) Haworth

More:
    Cactus oxypetalus Moc. & Sessé ex DC.
    Cereus latifrons Zucc.
    Cereus oxypetalus DC.
    Epiphyllum acuminatum K.Schum.
    Epiphyllum grande (Lem.) Britton & Rose
    Epiphyllum latifrons (Zucc.) Pfeiff.
    Epiphyllum oxypetalum var. purpusii (Weing.) Backeb.
    Epiphyllum purpusii (Weing.) F.M.Knuth
    Phyllocactus acuminatus (K. Schum.) K. Schum.
    Phyllocactus grandis Lem.
    Phyllocactus latifrons (Zucc.) Link ex Walp.
    Phyllocactus oxypetalus (DC.) Link
    Phyllocactus purpusii Weing.

https://en.wikipedia.org/wiki/Epiphyllum_oxypetalum