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9,568 species in South Dakota
Ramalina pollinaria
Ranunculus hispidus
Resapamea stipata
Ribes uva-crispa
Rinodina terrestris
Eleocharis obtusa
Sarcogyne clavus
Sassacus papenhoei
Schinia grandimedia
Schinia rivulosa
Phlox divaricata
Scytinium lichenoides
Sisymbrium officinale
Solidago riddellii
Sorex nanus
Sparganothis sulfureana
Elaeagnus commutata
Spilonema revertens
Spodoptera ornithogalli
Strigosella africana
Stylurus notatus
Sweltsa borealis
Tachysphex tarsatus
Elachista acenteta
Druon ignotum
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