Not any Phaeocollybia I know, but then, I don't know a lot of them, either. This is a very dark lead-grayish-black with green highlights to a very conical cap, but the stipe is ruby red as are the gills. Tiny stature, cap is barely an inch across, but probably 5 inches tall, only perhaps an inch of which was above ground level. Pretty sure I didn't get all the stipe, but I left my knife at home, and was using my fingers to dig it out quickly.