One more thing:
Here`s a link to a lot of truffle pictures.
http://www.natruffling.org/ (Click "truffle identification" which is the 12th link from the top or third from the bottom in the left menu. Also click where it says "photo gallery" on the truffle identification page to see lot of pictures of real truffles.)
Also they have pictures of the scleroderma puff ball things that start underground and work their way to the surface on the "truffle identification" page. It says do not eat them because they can upset your stomach. It looks like those have powdery stuff inside but the truffle is more solid inside.
Also, this page has a email link where you can write in to have them identified by experts. They also examine samples under a microscope if you want to send in dried specimens.
