Morchella importuna 
Morchella sceptriformis 
Morchella snyderi 
Morchella vulgaris 
Mustard powder lichen 
Myelochroa aurulenta 
Myelochroa galbina 
Nannfeldtiella aggregata 
Necker's Felt Lichen 
Nemania serpens var. serpens 
Neobarya agaricola 
Net-marked parmelia 
Oak Leaf Blister 
Oakmoss 
Ochre Cushion 
Ochre Gillgobbler 
Ochrolechia yasudae 
Olive Salver 
Ophiocordyceps buquetii 
Ophiocordyceps dipterigena 
Ophiocordyceps unilateralis 
Orange Earth Tongue 
Orange Lichen 
Orange peel fungus