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3,375 species in Joshua Tree National Park
Paravilla aridula
Paravilla cinerea
Parietaria floridana
Parkinsonia microphylla
Paruroctonus baergi
Paruroctonus borregoensis
Parvilucina mazatlanica
Parydra appendiculata
Paspalum dilatatum
Patiria miniata
Peccania subnigra
Pectocarya anisocarpa
Pelegrina balia
Peltula omphaliza
Pemphigus obesinymphae
Peniophora albobadia
Penstemon fruticiformis
Penstemon grinnellii
Penstemon heterophyllus
Penstemon incertus
Penthaleus major
Pepsis chrysothemis
Peraphyllum ramosissimum
Perdita compta
Perdita exilis
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