In a couple of recent posts I shared photos of plants I identified as Aporocactus. That, of course, is incorrect. The Aporocactus genus is comprised of 5 species (and is now combined by some into the genus Disocactus).
Instead, these should have been labeled Aporophyllum - or even more accurately X Aporophylum. These are intergeneric hybrids.
I apologize for the mistake. Unfortunately, it is a common error and all sorts of names are thrown about.
That said, I agree with the sentiment above...a "Rat tail" hybrid is by any other name...