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2,947 species in Isle Royale National Park
Rhytisma salicinum
Rinodina colobina
Rinodina metaboliza
Rosa blanda
Rumex longifolius
Rumex obtusifolius
Rumex triangulivalvis
Schistidium pulchrum
Schoenoplectus acutus
Scutellaria lateriflora
Setophaga aestiva
Silene latifolia
Silene vulgaris
Somatochlora williamsoni
Sparganothis xanthoides
Sphecodes cressonii
Sphinctrina anglica
Stelis foederalis
Stellaria longifolia
Stellaria media
Stemonitis axifera
Stereocaulon glaucescens
Stereocaulon pileatum
Stictoleptura canadensis
Symphyotrichum lanceolatum
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