This is a white gilled mushroom that I also found off the side of the sidewalk growing in the grass/dirt. This one has a small mushroom next to it that looks like it’s the same species. The gills and the cap are the same colour. The cap is covex and the cap margin kind of undulates. The surface of the cap is smooth, and there is no partial veil present. The gills are decurrent and look narrow, with average thickness and even edges. The stem is also centered. From the key provided, this mushroom might be a member of the Pleurotus genus.
