Chromosera cyanophylla 
Chroogomphus ochraceus 
Chrysomphalina aurantiaca 
Chrysomphalina grossula 
Cinnabar Bracket 
Cinnabar Oysterling 
Cinnabar-red Polypore 
Cinnamon bracket 
Cinnamon Webcap 
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