Since last winter I have had an Epiphyllum specimen which I took to be a Dutchman's pipe or queen of the night epiphyllum (Epiphyllum oxypetalum), associated in much of South and Southeast Asia with a popular fairy tale about a prince, a fairy named Bakāvalī, and the fairy's magic flower with healing powers - in Malay it is even known as bunga bakawali or "Bakawali flower"! Tonight my plant's first bloom opened, and it has turned out to not be Epiphyllum oxypetalum at all but Epiphyllum strictum, very similar but with spidery flowers of even purer white.
The flower has a spicy, grassy fragrance that carries quite far. I am very pleased with it. Though of course now I will also have to get a real Epiphyllum oxypetalum.