In article .com,
Sheldon wrote:

Amos Nomore wrote:
Sheldon wrote:

http://i10.tinypic.com/4zdbqmr.jpg

Is that a giant puffball behind the tree?

Yes, Calvatia propanetankus gigantea.

Wow. Hope nobody tries to cook it. I wondered if they'd evolved little
foot brackets. And stuff.