There are 11 recognized species of Austrocylindropuntia, primarily from South America. These were once included in Opuntia, but have since been separated out on their own. It is considered invasive in several areas of Africa, Australia and now parts of Europe.
Books to Consider
Name Derivation: From the Latin australis (southern) and the Greek cylindro (cylinder) and opuntia (referring to an ancient Greek city, Opus)
Common Name: Opuntia
Austrocylindropuntia is in the family Cactaceae.