I have a Hazel Nut tree that i have never thought about but 1 week ago i collected some twin nuts from the ground, left on window sill till today...they seem dry and i wanted to try them before i collect more from the tree.(its 20 feet tall).
Cracked them open and nothing inside...at all....just a thick skin under the shell.
Im sure when i collected these first there was a squidgy blackish stuff inside....i assumed this was a pre nut????