I have been growing both Jurupa and Monstreuse (formally Grosse Monstreuse di Lipari but I shorten it) for over 10 years and obtained my cuttings from a friend. I believe my friend "discovered" Jurupa in SoCal before the gardens it was located at was shut down. I don't know where he originally obtained Monstreuse but it has been spread around CRFG members since that time as well.