Seed that grows on oak trees besides the acorn???

Question

Does anyone know what kind of seed this is? It is round and about the size of a plumb. They are tan and have a paperthin coat. They float in water. If the shell is opened it has what appears to be a dandylion like seed in it. I have seen them on oak trees, but I thought the acorn was the seed of an oak tree. Any information to help my curiousity would be greatly appreciated. Thanks!

Answer 1

That is an oak apple.

see this link

This link has a picture

http://en.wikipedia.org/wiki/Oak_apple

this link has lots of info.

http://www.google.com/search?sourceid=na...

it is caused by a wasp it is not a fruit from the tree you are correct the acorn is the oaks seed.

Hope that was helpfull.