Bristly Tropical Cup 
British soldier lichen 
Brittle cinder 
Brown-eyed Camouflage Lichen 
Browned Pixie-cup Lichen 
Buellia spuria 
Buellia stillingiana 
Bulbothrix meizospora 
Bullseye Leaf Spot 
Bushy Beard Lichen 
Byssonectria terrestris 
Calcareous Rimmed Lichen 
Caloplaca aurantia 
Caloplaca cerina 
Caloplaca erythrocarpa 
Caloplaca flavovirescens 
Caloplaca ignea 
Caloplaca ochracea 
Camillea punctulata 
Candelaria concolor 
Candlesnuff fungus 
Canoparmelia caroliniana 
Cape Flame Lichen 
Cartilage Lichen