is a typical character that I see. I think I recall also seeing (although uncommon in this type) examples with a volval patch on the cap surface.
http://mushroomobserver.org/obs/69013?q=Bejn
As I understand the situation, Rod is interested in making multiple collections of this type of mushroom. Similarities/differences that exist among various collections contribute to potentially understanding a new species designation.
I have already sent specimens to Rod. But, now that you mention it Martin, I may still have a few at home, and I should also send those.