The ever living! The culture these spores are harvested from came from Julian Mattucci. His culture produced fruits that tested astronomically high in the Island Cup HPLC event at over 40mg/g combined total alkaloids! The taxonomy of P subtropicalis is a bit convoluted, it has synonymous names that made things pretty murky. Thankfully through the use of DNA barcoding people like Alan Rockefeller have helped to resolve many of these issues. One of the most interesting thing to me however, is that semperviva was described by Heim in 1958, long before Guzmán's description of subtropicalis in 1995.  I'm not a taxonomist, but I beleive in most cases newer synonyms are collapsed and the oldest name is the one that is used going forward. Maybe one day we will see the species name P subtropicalis be replaced by P semperviva.