I ordered some "Northern Illinois Bur Oak" acorns on eBay. I assumed that they were Bur Cup Oak acorns (Macrocarpia) which are the largest acorns in the oak family. These acorns are I received were much smaller, about the size of black oak acorns. The acorns were all mature and viable (float test). Do you know of a variety of oak named the "Northern Illinois Bur Oak?" I searched the internet, but could not find anything. Thank you.