physica stellaris 
Pink earth lichen 
Placopsis gelida 
Plitt's Pore Lichen 
Polysporina gyrocarpa 
Porpidia crustulata 
Porpidia macrocarpa 
Powdered Sunshine Lichen 
Pseudocyphellaria crocata 
Pseudocyphellaria rufovirescens 
Psilolechia lucida 
Punctelia rudecta 
Punctelia subrudecta 
Pyrrhospora varians 
Pyxine sorediata 
Ramalina sinensis 
Reindeer Lichen 
Reindeer Lichen 
Rhizocarpon geographicum 
Rhizoplaca chrysoleuca 
Rock Foam Lichen 
Rock-loving Cladonia 
Romjularia lurida 
Ropalospora viridis