This group is for mushrooms which do not fit the other groups and there are many.
Armillaria solidipes
Collybia brunneocephala
Cudonia circinans
Flammulina populicola
Floccularia albolanaripes
Gomphidius glutinosus
Gyromitra infula
Helvella elastica
Laccaria laccata
Marasmius oreades
Pholiota squarrosa
Tricholoma populinum
Truncocolumella citrina
Ustilago maydis