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1,791 species in Theodore Roosevelt National Park
Setophaga fusca
Setophaga virens
Sisyrinchium montanum
Sonchus arvensis
Sphex lucae
Sporobolus hookerianus
Staurothele monicae
Sterna hirundo
Stizoides renicinctus
Stutzia dioica
Sympetrum costiferum
Sympetrum madidum
Sympetrum pallipes
Symphyotrichum boreale
Sympistis chionanthi
Didymodon rigidulus
Elymus trachycaulus
Mycobilimbia tetramera
Cycnia oregonensis
Cynoglossum officinale
Cystiphora sonchi
Deconica coprophila
Dermatocarpon americanum
Descurainia pinnata
Diadasia diminuta
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