Drove past a yard today that looked like it was full of them! Clump after clump. Didn't have time to stop and knock on the door. Looked like a storm was coming, so I was beating feet for home, I had windows open. I found a clump that looked kind of like yours in my Chant spot. It was small, 8 or 10 shrooms at most. Dimpled cap, but the shrooms had rings. Also looked like it was growing from the ground, but then found a couple others nearby growing from the base of an old, dead snag.Thanks, CW. I don't find those very often at all, and certainly never the first week of September. Didn't realize they can have decurrant gills.