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4,849 species in Grand Canyon National Park
Onopordum acanthium
Opuntia pinkavae
Osmia ribifloris
Paltothemis lineatipes
Paronychia sessiliflora
Microvelia torquata
Penstemon strictus
Peromyscopsylla hesperomys
Petalonyx parryi
Mentzelia integra
Phacelia cronquistiana
Phacelia furnissii
Pheidole clydei
Phidippus carneus
Phyciodes tharos
Phyla cuneifolia
Physarum decipiens
Proboscidea parviflora
Psora cerebriformis
Puccinia grindeliae
Puccinia monoica
Melissodes rivalis
Purshia tridentata
Pyrofomes juniperinus
Schinia erosa
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