The Ohio state tree is the Buckeye Tree. When the buckeye pods ripen they fall to the ground and dry with a spiked outer layer. You break the outer layer off and you find the buckeye within. The Indians in ancient days would crack the buckeye open and cook the nut within and mash it into a meal. It is said that they believed it had medicinal value. WARNING: IT IS SAID THAT IF YOU EAT THE NUT IN THE BUCKEYE IT IS POISONOUS! I guess I wouldn't adventure to try to eat it.