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2,947 species in Isle Royale National Park
Trifolium aureum
Trilophozia quinquedentata
Tyrannus forficatus
Ulota crispa
Umbilicaria torrefacta
Usnea subfusca
Usnea subscabrosa
Utricularia gibba
Veronica peregrina
Vallisneria americana
Veronica americana
Verrucaria aethiobola
Verrucaria margacea
Verrucaria nigrescens
Verrucaria viridula
Vibrissea truncorum
Viburnum opulus
Viola eriocarpa
Viola labradorica
Vitula broweri
Woodsia oregana
Xanthoparmelia lineola
Xeromphalina campanella
Xestoleptura tibialis
Xyris montana
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