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2,243 species in Mammoth Cave National Park
Sisyrinchium albidum
Sisyrinchium angustifolium
Smilax ecirrhata
Solidago rupestris
Solidago ulmifolia
Spiraea prunifolia
Stenotrema stenotrema
Stomoxys calcitrans
Strobilomyces strobilaceus
Strumigenys clypeata
Strumigenys pulchella
Stygobromus exilis
Sumitrosis inaequalis
Symphyotrichum shortii
Tetrapyrgos nigripes
Texania campestris
Thaspium trifoliatum
Thuidium delicatulum
Tigrosa annexa
Tigrosa helluo
Tipula fuliginosa
Toxomerus politus
Trametes conchifer
Trichaptum biforme
Trifolium campestre
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