The genera Oudemansiella, Xerula and Megacollybia form groups of Agarics with slimy, shiny or velvety caps with wide, obese, free, white to whitish gills and tough, often deep-rooting stipes occasionally rooting with mycelium strands. Spores white. In Britain a few species of the genera Oudemansiella, Xerula and Megacollybia occur.
Listed taxa:
- Oudemansiella mucida, Porcelain Fungus
- Xerula radicata, Rooting Shank
- Megacollybia plathyphylla, Broad Gilled Agaric