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6,550 species in Shenandoah National Park
Populus alba
Porpidia cinereoatra
Potentilla norvegica
Prostoia completa
Protoparmelia hypotremella
Pseudanophthalmus hubbardi
Pseudevernia cladonia
Pseudopachybrachius basalis
Punctelia reddenda
Pycnopsyche guttifera
Pycnopsyche lepida
Pycnopsyche subfasciata
Pyganodon cataracta
Pyralis farinalis
Pyrausta bicoloralis
Pyrausta generosa
Pyxine subcinerea
Quercus palustris
Ratibida pinnata
Remenus bilobatus
Rhamnus lanceolata
Rinodina pyrina
Rorippa sylvestris
Rubus laciniatus
Salticus scenicus
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