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4,501 species in Indiana Dunes National Park
Sedum sarmentosum
Serica sericea
Catocala relicta
Simocybe centunculus
Lycaena phlaeas
Sitona hispidulus
Sium suave
Solanum emulans
Solenopsis molesta
Solidago juncea
Sperchopsis tessellata
Sphaeridium lunatum
Campostoma anomalum
Sphagnum compactum
Sphagnum papillosum
Spilodiscus biplagiatus
Stereum fasciatum
Symphyotrichum dumosum
Carex umbellata
Syringa vulgaris
Tectosternum naviculare
Thlaspi arvense
Tortricidia flexuosa
Trifolium repens
Tylopilus felleus
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