Out for a nice fall walk at a nature preserve today and stumbled across these. They were all oriented up the same way. I first thought they were nuts with husks on them until I broke one open. It is firm and whitish green inside. The outside felt waxy and smelled like a pear. I took another one home and cut it open. I figure a type of mushroom or puffball. It was near a mix of hardwoods. What do you think?