Cactus seeds, succulents, lithops and more. Cacti belong in the family of cactaceae. They originate from the USA, south Canada and Patagonia but some species are also found in the African region. Cactuses are currently widespread all along the world mainly as ornamentals and many people have a great interest in this plant category. The term succulents derives from the fact that cactuses develop wide meaty leaves which helps them store water in their leaves and trunk as they usually develop in waterless areas. See below all available cactus varieties.