Oxyporus populinus 
Oyster mushroom 
Pagoda Fungus 
Painted Suillus 
Pale Bramble Rust 
Pale Brittlestem 
Pale-yellow splash tooth 
Panaeolina foenisecii 
Panellus luxfilamentus 
Panellus pusillus 
Panus lecomtei 
Papillate Waxcap 
Parasitic Bolete 
Parasol 
Parrot Mushroom 
Parsley-scented russula 
Patriotic Bolete 
Paxillus vernalis 
Peach-Colored Fly Agaric 
Pear-shaped Puffball 
Pear-shaped Puffball 
Peck's Yellow Dust Amanita 
Peeling puffball 
Pelargonium webcap