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2,947 species in Isle Royale National Park
Saxifraga cespitosa
Scapania apiculata
Scapania curta
Scapania irrigua
Scapania lingulata
Schistidium confertum
Schistidium crassithecium
Schistidium robustum
Schistochilopsis incisa
Schizophyllum commune
Schoenoplectus pungens
Schoenoplectus tabernaemontani
Scirpus cyperinus
Scleranthus annuus
Scopula inductata
Scytinium pulvinatum
Scytinostroma odoratum
Sebacina schweinitzii
Sedum acre
Serromyia femorata
Setophaga discolor
Setophaga dominica
Sibirenauta elongata
Sicya macularia
Sigara alternata
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