I found this group of mushrooms in Robert Burnaby Park. They were growing on the ground on top of a decaying log. They have a cumpanulate (bell shaped) cap, with even margins when they are young. As they get older the cap margin begins to look gnawed and the cap colour becomes darker, cap shape also somewhat lost. The cap texture appears sericeous or smooth. The gills are narrow and appear to be adnexed. The gills are also close together and even. The stem attaches centrally and is equal, or multiple potentially radicating from central location. The texture of the stem appears fibrous. I believe that these mushrooms are Hypholoma fasciculare, or common name Sulphur Tuft.