Ok, a part of identifying mushrooms has nothing to do with the way it looks - that is what so many who don't forage don't comprehend. A part of it is where they grow, on what sort of substrate (and it isn't always easy to tell, there could be a tiny bit of rotten wood beneith the soil but it looks like the mushroom is growing on soil. I once found a bunch of mushrooms that looked like they were growing on rotted straw but when I looked closely, they were growing from the skin of a dead dog benieth the straw.
Are they solitary or in clusters or in groups? (this one you may have answered in your pictures). What does the base of the mushroom look like, how is it attached to the mycelial matt under the substrate? how persistant is the veil, is there a pellicle and how persistant or attached is it, what is the pattern of the gills in the cap? are they attached to the stem? are some of them attached? as I said, what is the color of the spores? (you should always know that), does the mushroom "stain", or... if it is bruised, does it turn a particular color. What about smell? what does it smell like (if it does smell at all), what season did you pick it in? What is the stem like? is it woody? stiff or pliable?
You see, the identification starts long before you pick the mushroom and it just can't work with even the fine assortment of pictures you have there - especially with a non-descript mushroom like the one you have. It might be different with say an Amanita Muscaria - that i believe grows in your area, but yours as I say are lbms and so are much harder to id.