T. Peru monstrose i was able to aquirr a few large mother plantsof awhile back.  Believed to be Peruvian due to elongated base spines and fat areiols but because these were purchased without an I.d. that is speculation.  This clone has crested, grown dichot and even varigated befor.  This listing is cut to order so it will need at least a week to drive from time of purchase in order to ship safely.