Oh I had one of these years ago, it was a monstrose form of a cereus but I forget the name.

This post was edited by greenlarry on Tue, Jul 16, 13 at 8:20

I didn't know if yours was monstrose or not. I have one with yellow spines, and the label said Cereus Peruvianus Monstrose cv "Camelot".

Here's a link to a picture of my little cereus.

I'll let you decide if they are the same. :-)
Lennie

Here is a link that might be useful: cereus peruvianus monstrose