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2,947 species in Isle Royale National Park
Pseudoplectania nigrella
Pseudothyatira cymatophoroides
Psilopezia nummularia
Psora russellii
Psorula rufonigra
Pterigynandrum filiforme
Puccinia calthae
Puccinia caricina
Puccinia circaeae
Puccinia coronata
Puccinia epilobii
Puccinia grindeliae
Puccinia haleniae
Puccinia limosae
Puccinia waldsteiniae
Punctelia subflava
Punctularia strigosozonata
Punctum pygmaeum
Pycnoporellus alboluteus
Pyganodon lacustris
Pyla fusca
Pyractomena borealis
Pyrausta fodinalis
Pyrola americana
Pyronema omphalodes
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