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3,140 species in Grand Teton National Park
Sidalcea oregana
Sideridis rosea
Silene dichotoma
Silene douglasii
Simulium latipes
Simulium wyomingense
Sium suave
Slaterobius insignis
Solidago gigantea
Solidago lepida
Solidago spathulata
Solidago spectabilis
Somatochlora minor
Somatochlora semicircularis
Sonchus arvensis
Sorbus aucuparia
Sorex nanus
Sorex navigator
Spargania luctuata
Spargania magnoliata
Sparganium angustifolium
Speranza brunneata
Sphex ichneumoneus
Spiramater lutra
Stellaria borealis
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