clitocybe vibecina 
Clitopilus crispus 
Clitopilus hobsonii 
Cloud ear fungus 
Clouded Agaric 
Club Coral 
Club-foot Clitocybe 
Club-like Tuning Fork 
Clustered coral 
Coal fungus 
Cobalt Crust 
Coccomyces dentatus 
Coccomyces triangularis 
Cochise's American Caesar 
Coker's Amanita 
Coker's Lavender Staining Amanita 
Coleosporium elephantopodis 
Coleosporium ipomoeae 
Coleosporium vernoniae 
Collared Calostoma 
Collybia cirrhata 
Collybia cookei 
Collybia eucalyptorum 
Collybiopsis subnuda