The official State bird is the Cardinal.
The Ohio Buckeye is the official state tree of Ohio.
Bluegrass State flag
The White Oak is the Official State Tree of Maryland.
The tulip tree is the official state tree of Indiana.
The Kukui nut tree (Candlenut tree) is the state tree. I do not think there is an official state nut- but the macadamia is pretty popular!
Kentucky Agate- but coal is the state mineral.
The Pine is the official state tree of Arkansas.
Kentucky's Nickname is The Bluegrass State.
The American Elm is the official state tree of Massachusetts.
There is no state with the water oak as an official state tree.
The Buckeye Tree, is the state tree of Ohio, Ohio State University, being the official state University of Ohio, used the name of the State tree (Buckeye Tree) for their official athletic nickname.