Native to South America, they are known as hedgehog cactus, Sea-urchin cactus, or Easter lily cactus. Some are known as peanut cactus. The 128 species range from large and treelike types to small flattened-globose cacti. The flowers are quite large in size and form a tube stem before opening. They like full sun but require afternoon shade from the hot weather. Don’t over water as they like to keep dry and well-drained soil is required.