Stop by your local book store and pick-up a mushroom key, or check one out at the library. Familiarize yourself with the terms applied to mushroom's individual structure and appearance; gills or not, gills parallel each other or joining to form bifurcated branches, gills attached to the stalk or not, etc.
One thing I can tell you it is not is that it is not a bolete. Members of this group all have sponge shaped gills, many of these grow under or on decaying pines. Many are edible, but largely tasteless. But, then there is Boletus edulis, great as a base flavor in soups and stews.
As Jode mentioned, you will also need to take a spore print, best done on plain white copier paper with some type of cover over the mushroom to render the air immediately around the fruiting body inert. Color and texture of spores is usually enough to get you through the couplets that are based on spore print information. Sometimes you will need to look at them individually under magnification.
You are also in a part of the United States where Psylocybe cubensis grows in abundance, if you know where to look. Be careful.