Hi cortona, I am not qualified yet to comment on your question. From what I think, Frank, Paolo, Flavio and C&D, are more qualified to answer your question. I named it, Astrophytum oronz cv. "Mariepardi" for my wife, for the patience she takes for me and instead of giving it just a number only, although I gave it a number too. I prefare a name. That plant is 11 years old from my seeds and on its own roots.