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3,375 species in Joshua Tree National Park
Reticulitermes hesperus
Rhinoplatia ruficollis
Rhipicephalus sanguineus
Rhizocarpon disporum
Rhizoplaca subdiscrepans
Rhizopus stolonifer
Rhopalomyia audibertiae
Rhopalomyia glutinosa
Rhus lanceolata
Ribes cereum
Rumex salicifolius
Salix melanopsis
Salix scouleriana
Salix sessilifolia
Saltugilia australis
Salvia carduacea
Salvinia minima
Saprinus alienus
Saxinis deserticola
Scarites subterraneus
Sceloporus graciosus
Sceloporus utiformis
Schinia argentifascia
Schinia aurantiaca
Schinia citrinellus
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