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4,849 species in Grand Canyon National Park
Pissonotus albovenosus
Plantago tweedyi
Pogonomyrmex barbatus
Persicaria amphibia
Antennaria rosea
Lupinus sericeus
Polycauliona polycarpa
Polygonum polygaloides
Potamogeton gramineus
Puccinia substerilis
Rhinoplatia mortivallicola
Rhizoplaca subdiscrepans
Rinodina grandilocularis
Rinodina juniperina
Rumex obtusifolius
Salvadora hexalepis
Salvia aethiopis
Sanguisorba minor
Scaeva affinis
Selaginella leucobryoides
Sorghum halepense
Spergularia rubra
Sporobolus giganteus
Squamarina lentigera
Staurothele elenkinii
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