Cinnamon bracket 
Cinnamon Webcap 
Citrus Green Mold 
Cladia retipora 
Clarkeinda trachodes 
Clathrus chrysomycelinus 
Clavaria argillacea 
Clavariadelphus americanus 
Clavulina cinerea 
Clavulina vinaceocervina 
Clavulinopsis aurantiocinnabarina 
Clavulinopsis corniculata 
Climacocystis Borealis 
Climacodon pulcherrimus 
Clitocybe albirhiza 
Clitocybe albofragrans 
Clitocybe americana 
Clitocybe diatreta 
Clitocybe fragrans 
Clitocybe glacialis 
Clitocybe mitis 
Clitocybe peralbida 
Clitocybe subditopoda 
Clitocybe trulliformis