Epiphyllum oxypetalum

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.

In India it is called Brahma Kamalam, named after the Hindu god of creation, Lord Brahma. It is also believed that the wishes of People who pray to God while the flower is blooming will be fulfilled.
Native to Central America and Northern South America, E. oxypetalum blooms rarely and only at night and the flower wilts before dawn.

In 1909, C. A. Purpus collected a slightly different type in St. Ana, Orizaba, Mexico. It has carmine red outer petals and the flowers have an unpleasant smell, rather than being fragrant. It was originally named Phyllocactus purpusii, but does probably not deserve any botanical recognition.

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An easily cultivated, fast growing Epiphyllum. It flowers in late spring or early summer; large specimens can produce several crops of flowers in a season. This is the most commonly grown of the Epiphyllum species.

Stems erect, ascending, scandent or sprawling, profusely branched, primary stems terete, to 2–6 m long, flattened laterally, ligneous at base, secondary stems flat, elliptic-acuminate, to 30 cm x 10–12 cm, thin; margins shallowly to deeply crenate and ± undulate. Flowers produced from flattened portions, to 30 cm long, 12–17 cm wide, nocturnal, very fragrant. 

The principal odor component in the aroma is benzyl salicylate; pericarpel nude, slightly angled, green, bracteoles short; receptacle 13–20 cm long, 1 cm thick, brownish, arching, bracteoles narrow, ca 10 mm long; outer tepals linear, acute, 8–10 cm long reddish to amber; inner tepals oblanceolate to oblong, acuminate, to 8–10 cm long and 2,5 cm wide, whitish; stamens greenish white or white, slender and weak; style greenish white or white, 4 mm thick, as long as inner tepals, lobes many, pale yellow or white. Fruit oblong, 12 x 8 cm, purplish red, angled.