Fully agree with that they are awesome plants. I have three, which I think are all ssp. nejapensis, but I have not really checked for the presence of a central spine, mine also all came labeled as nejapensis. One has split once so is two headed, another has split twice and the second time in both heads so is four headed and then I have my three headed monster... which split twice but on the second split only in one of the two existing heads giving it a three headed look.
