Austrocylindropuntia cactacearum
hort.
Etymology
Latin Cactacearum ‘of [the] Cactaceae’. Attributed by GBIF and The Plant List to Curt Backeberg, Blätt. Kakteenf. 6. 1938, but not mentioned there. Likely based on a misreading.
Maarten H.J. van der Meer (2022 Feb 05). Austrocylindropuntia cactacearum. Dictionary of Cactus Names. Retrieved from https://www.cactusnames.org/austrocylindropuntia-cactacearum