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2,947 species in Isle Royale National Park
Solidago simplex
Solierella plenoculoides
Somatochlora forcipata
Somatochlora tenebrosa
Sorbus aucuparia
Sphaerium simile
Sphaerium striatinum
Sphaeronaemella helvellae
Sphagnum angustifolium
Sphagnum compactum
Sphagnum palustre
Sphagnum papillosum
Sphagnum platyphyllum
Sphagnum riparium
Sphagnum rubellum
Sphagnum subfulvum
Sphinctrina tubaeformis
Sphinx poecila
Spilosoma congrua
Spinulum canadense
Spizella pusilla
Splachnum sphaericum
Steatoda borealis
Stelis subemarginata
Stemonitis splendens
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