There are several genera of cactus native to desert regions of North and South America that are known as Night-blooming Cereus. In my neighborhood, the most commonly grown species is Epiphyllum oxypetalum. My neighbor’s twenty-year old plant bloomed for the first time last night. This species is native to southern Mexico and adjacent Guatemala and widely grown as a houseplant elsewhere and outdoors in warmers climates. See my Night-blooming Cereus images.