Charcoal Psathyrella 
Cheimonophyllum candidissimum 
Chestnut bolete 
Chicken fat mushroom 
Chicken lips 
Chicken of the Woods 
Chippewa Bolete 
Chlorencoelia versiformis 
Chlorophyllum hortense 
Chlorophyllum olivieri 
Chlorosplenium chlora 
Christmas Fern Leaf Curl 
Christmas Lichen 
Chromelosporiopsis coerulescens 
Chromosera cyanophylla 
Chroogomphus ochraceus 
Chrysomphalina aurantiaca 
Chrysomphalina grossula 
Chrysothrix caesia 
Chrysothrix xanthina 
Cinder Lichen 
Cinnabar Bracket 
Cinnabar Oysterling 
Cinnabar-red Polypore