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4,849 species in Grand Canyon National Park
Limenitis archippus
Lithurgopsis apicalis
Loeseliastrum schottii
Lolium arundinaceum
Lophodermium arundinaceum
Loxosceles deserta
Lupinus barbiger
Lycium cooperi
Lycus sanguineus
Lygaeus reclivatus
Macbrideola decapillata
Macrosiphum euphorbiae
Manduca sexta
Megachile subexilis
Melacoryphus rubicollis
Melanoplus femurrubrum
Melanoplus occidentalis
Meleoma schwarzi
Melissodes utahensis
Mentzelia affinis
Mentzelia involucrata
Mentzelia rusbyi
Meris alticola
Micrathetis costiplaga
Microcentrum rhombifolium
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