It depends on the species. The Christmas cactus is a member of the Cactaceae family, but it is not a true cactus. It is actually more closely related to the succulent family. It is a perennial plant that is native to the Atlantic Forest region of Brazil. The Christmas cactus has flat, succulent leaves and produces bright pink, red, or white flowers in the winter. It is a popular holiday plant that is known for its beauty and durability.