Clitocybe glacialis 
Clitocybe mitis 
Clitocybe peralbida 
Clitocybe subditopoda 
Clitocybe trulliformis 
clitocybe vibecina 
Clitopilus crispus 
Clitopilus hobsonii 
Clouded Agaric 
Club-foot Clitocybe 
Cochise's American Caesar 
Coker's Amanita 
Coker's Lavender Staining Amanita 
Collybia cirrhata 
Collybia cookei 
Collybia eucalyptorum 
Collybiopsis subnuda 
Common Bird's Nest Fungus 
Common Bird's Nest Fungus 
Common Fieldcap 
Common Funnel 
Common ink cap 
Common puffball 
Common Stump Brittlestem