Epiphyllum oxypetalum, scientifically known as Epiphyllum oxypetalum, is nicknamed Dutchman's Pipe and Queen of the Night in English colloquialisms. Kadupul flower is a plant belonging to the cactus family and is a flower that is widely cultivated in other countries. Although sometimes referred to as the night cactus, it does not show many of the characteristics of cactus plants. However, like other plants belonging to the cactus family, flowers bloom only at night.