Thank you again Rick for your generous comments. Yes I'll go back to the PBS site and search who have grown erythroniums successfuly. Along with my Erythronium montanum I also received Lillium bulbiferum ssp croceum. Do you have any idea about those?. I'm particularly fond of the species Lilliums although I never reject any Lillium whatever their stage of domestication. I read your list of all the Liliums earlier in this thread and I would need a second lifetime for them!
I still hope to expand mine by seed and will have to find specialized sources for them. Also following Ian Young's advice that one reduces considerably the sources of disease by setting out from seed. Do you have suggestions apart from annual seedex's?
Thank you so much for your time
