I found a group of these mushrooms on a lawn in my neighbourhood. Their cap is either cushion shaped or saucer shaped, with an indent in the centre. The cap margin is smooth and incurved. The partial veil system is subperonate. The broad gills are emarginate and average thickness. They are subdistant apart and even edged. The stem is central and club shaped. I cannot tell if there is a bulb present. I believe these may be Tricholoma murrillianum.