the three sisters

''Selenicereus grandiflorus'' is a cactus species originating from the Antilles, Mexico and Central America. The species is commonly referred to as Nightblooming Cereus, Queen of the Night , Large-flowered Cactus, Sweet-Scented Cactus or Vanilla Cactus. The true species is extremely rare in cultivation. Most of the plants under this name belong to other species or hybrids. Often confused with the species of ''Epiphyllum''.