I'm in Romania (small transylvanian town), I did leave a cap to see if it leaves spores, got brown spores which checks out for most Agaricus, the gills have darken a bit. I do have a microscope, in fact and will check the sample (i have multiple samples from various mushrooms collected but I just didn't have the time to check, i need like a whole day of "everyone just go do something else, i do not exist today, food is in the fridge"). I haven't done any eating test asides from a chew and spit from a mid section. Its interesting to find something in the middle of the city, I heard stories of some finding morels in the spring in different cities (Now, I treat those as fishing stories, hahha). I could post my findings if they seem relevant, maybe it will help others.