THX- these trees are 40+ ft tall and are in great shape. They are American Chestnut, from all I can determine, leaf, trunk, seed, etc. I know the two foundations/societies are interested in cultures from these mature trees and I have sent email to both. I have several seeds to experiment with and am trying planting some now and storing some in the fridge. Some of the burs have a tendril coming out and 1 has a leaf, I am planting the one with the leaf but I am not sure what to do with the ones with the tendril. Any help is greatly appreciated.