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6,550 species in Shenandoah National Park
Soyedina vallicularia
Sphex pensylvanicus
Spiranthes vernalis
Sterna forsteri
Strophopteryx fasciata
Strumigenys rostrata
Sylvilagus obscurus
Symphyotrichum oblongifolium
Tachycines asynamorus
Tanyptera dorsalis
Temnothorax curvispinosus
Tenodera angustipennis
Tetraopes melanurus
Teuchocnemis lituratus
Toxomerus boscii
Trachelas tranquillus
Triodopsis fallax
Tylopilus plumbeoviolaceus
Uranotaenia sapphirina
Usnea mutabilis
Vernonia glauca
Veronica americana
Vespula consobrina
Aeshna umbrosa
Viburnum recognitum
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