Crystal Brain Fungus 
Cuphophyllus borealis 
Curry Milkcap 
Curry punk 
Cyathus olla 
Cyclocibe aegerita 
Cyclocybe cylindracea 
Cymatoderma caperatum 
cymatoderma elegans 
Cystoderma aureum 
Cystodermella cinnabarina 
Dacrymyces capitatus 
Dacrymyces ovisporus 
Dacryopinax elegans 
Dappled Webcap 
Dark fieldcap 
Darkening Brittlegill 
Datroniella scutellata 
Dead man's hand 
Death cap 
Deceiving milkcap 
Deconica horizontalis 
Deconica merdaria 
Decorated Mop