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4,927 species in Cuyahoga Valley National Park
Pellia epiphylla
Peltigera praetextata
Perilla frutescens
Phasianus colchicus
Phobetron pithecium
Pholcus manueli
Pholiota squarrosoides
Pilosella officinarum
Plagiodera versicolora
Planorbella trivolvis
Plegadis falcinellus
Poa annua
Poa compressa
Polydrusus formosus
Porpidia crustulata
Protoboarmia porcelaria
Ptecticus trivittatus
Puccinia mariae-wilsoniae
Pyrola americana
Ramularia rubella
Ranunculus bulbosus
Renia adspergillus
Retiboletus ornatipes
Rhagio mystaceus
Rhus aromatica
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