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4,849 species in Grand Canyon National Park
Pyla fasciolalis
Rallus limicola
Rhinacloa forticornis
Rorippa palustris
Rorippa sphaerocarpa
Rumex hymenosepalus
Rumex triangulivalvis
Sagina saginoides
Salvia subincisa
Saprinus oregonensis
Schinia hulstia
Schistocerca lineata
Senna bauhinioides
Setophaga pensylvanica
Sophora nuttalliana
Spilomyia liturata
Stamnodes modocata
Steatoda hespera
Stenopogon inquinatus
Stenoporpia anellula
Stephanomeria parryi
Timmia megapolitana
Trichaptum abietinum
Vesper multinervatus
Viola nuttallii
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