This website and several others are dedicated to the hedge apple, aka hedgeapple, aka osage orange. It is an inedible, green fruit from the osage orange tree, aka bow wood tree, aka bodark tree. Apparently the hedge apple's only purpose in life is to propogate the multi-named tree and to be dried & used for decoration, where it can allegedly ward off insects. But even Martha Stewart has mentioned using the hedge apple as a decoration.