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1,791 species in Theodore Roosevelt National Park
Rhyssemus sonatus
Rinodina guzzinii
Rinodina pycnocarpa
Rinodina zwackhiana
Rorippa palustris
Rumex patientia
Salix bebbiana
Salix famelica
Salix interior
Salix lutea
Sarcogyne clavus
Sassacus papenhoei
Satyrium liparops
Schinia jaguarina
Schinia meadi
Schistidium apocarpum
Schizocosa cespitum
Scotinella pugnata
Scudderia texensis
Scytinium tenuissimum
Securigera varia
Sedum album
Sedum lanceolatum
Semotilus atromaculatus
Sergiolus ocellatus
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