Morchella vulgaris 
Mountain moss Psilocybe 
Mousepee Pinkgill 
Mower's Mushroom 
Mucronella bresadolae 
Mucronella fusiformis 
Mucronella pendula 
Mucronella pulchra 
Multiflora Rose Rust 
Muscinupta laevis 
Mustard powder lichen 
Mustard Yellow Polypore 
Mutinus bambusinus 
Mycena alphitophora 
Mycena Aprilis 
Mycena atkinsoniana 
Mycena aurantiidisca 
Mycena capillaripes 
Mycena clarkeana 
Mycena epipterygioides 
Mycena flavescens 
Mycena illuminans 
Mycena metata 
Mycena oregonensis