I was just reading thru your article and thought I'd shoot this to you. Last year I found some " extra white " morels that I thought were just sterile. I sent one to a friend and he looked at it thru a scope, and to him they appeared to be sterile too. He sent it to someone else and they found it able to produce spores. ( when I receive his information I will forward it to you ) anyway, I posted it on " Mushroom Observer " finally, almost a year later, I received information that it may be, either Morchella esculentoides or M. cryptic or, even a new strain.