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1,791 species in Theodore Roosevelt National Park
Crataegus chrysocarpa
Crataegus macracantha
Didymium squamulosum
Echinostelium minutum
Ellisia nyctelea
Elymus repens
Enallagma civile
Enerthenema papillatum
Epicauta ferruginea
Erigeron pumilus
Erysimum cheiranthoides
Erysimum inconspicuum
Euphorbia stictospora
Euphyes vestris
Evarcha hoyi
Formica obtusopilosa
Gastrocopta holzingeri
Geum aleppicum
Gryllus pennsylvanicus
Habronattus viridipes
Halictus confusus
Hesperostipa spartea
Hippiscus ocelote
Hymenopappus filifolius
Idia americalis
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