Here is a very interesting talk about what  the Fungus Federation of Santa Cruz is trying to document all the mushrooms growing in the county. There is lot more information in the talk that can pertain to other parts of the country and some fascinating data. It is almost an hour and a half long but if you want to know more about fungi and fungi projects that need to be done: Watch it! It might open your eyes.

http://www.youtube.com/watch?v=CFs8aKO8vcc