Marasmiellus praeacutus 
Marasmius alveolaris 
Marasmius armeniacus 
Marasmius capillaris 
Marasmius crinis-equi 
Marasmius lachnophyllus 
Marasmius plicatulus 
Marasmius purpureostriatus 
Marasmius strictipes 
Marasmius sullivantii 
Marsh Webcap 
Marshmallow bolete 
Marshmallow Polypore 
Matte Jack 
Mauve Bonnet 
Mauve Splitting Waxcap 
Meadow Mushroom 
Meadow waxcap 
Mealy amanita 
Megacollybia subfurfuracea 
Melanoleuca arcuata 
Melanoleuca melaleuca 
Merismodes Anomala 
Mica Cap