Opuntia, one of the largest cactus families, is made up of desert cactus found throughout the Americas. They are low maintenance plants needing little water. They are also adapted to a very hot, dry climate. Opuntia microdasys, also known as bunny ears cactus, Mickey Mouse cactus and prickly pear cactus, has no sharp spines, but avoid touching it as the fine hairs can irritate the skin!