Clitocybe glacialis 
Clitocybe mitis 
Clitocybe peralbida 
Clitocybe subditopoda 
Clitocybe trulliformis 
clitocybe vibecina 
Clitopilus crispus 
Clitopilus hobsonii 
Clouded Agaric 
Club Coral 
Club-foot Clitocybe 
Clustered coral 
Cobalt Crust 
Cochise's American Caesar 
Coker's Amanita 
Coker's Lavender Staining Amanita 
Collared Calostoma 
Collybia cirrhata 
Collybia cookei 
Collybia eucalyptorum 
Collybiopsis subnuda 
Coltricia australica 
Coltricia montagnei 
Colus hirudinosus