Cortinarius muscigenus 
Cortinarius mutabilis 
Cortinarius persplendidus 
Cortinarius phalarus 
Cortinarius pluvius 
Cortinarius seidliae 
cortinarius semisanguineus 
Cortinarius sinapicolor 
Cortinarius vanduzerensis 
Cortinarius violaceus 
Crimped Gill 
Crimson Waxcap 
Crinipellis setipes 
Cross-veined Troop Mushroom 
Crowded White Clitocybe 
Cryptic bonnet 
Cuphophyllus borealis 
Cyathus olla 
Cyclocibe aegerita 
Cyclocybe cylindracea 
Cystoderma aureum 
Cystodermella cinnabarina 
Dappled Webcap 
Dark fieldcap