Selenicereus grandiflorus is a type of cactus known for its large, fragrant, and showy flowers. It is also commonly known as the Queen of the Night due to its habit of blooming at night. Other common synonyms for Selenicereus grandiflorus include the Night-blooming Cereus and the Sweet-Scented Cactus. In addition, it is also known as Cactus grandiflorus, which is another valid name for the same species. Regardless of the name, Selenicereus grandiflorus remains a popular cactus species for collectors and enthusiasts due to its striking appearance and unique blooming habit.