I have a local Missouri mushroom book and can't find it. I have also used my google-fu with no results. It hasn't rained here in about a week, so they are somewhat dry. They are growing out from the gravel slope of our driveway, about 3-4ft from forest (oak, hickory). This one is about 2 inches tall and the spread is about 2-3 inches. I do know they get much larger since a few months back there was a large group of them (about 7 or 8) growing out from the dirt in the same area. Biggest being about 4-5" across and about 3-4" in height. I live in roughly central Missouri.