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4,118 species in Yellowstone National Park
Juniperus virginiana
Kalmia polifolia
Kellicottia longispina
Keratella quadrata
Knautia arvensis
Koeleria spicata
Labopidea nigrisetosa
Lachnellula arida
Lacinipolia laudabilis
Lactarius alpinus
Lactarius glyciosmus
Lactarius olivinus
Lactarius payettensis
Lactarius pubescens
Lactarius rubrilacteus
Lactarius sanguifluus
Lactarius torminosus
Lactuca tatarica
Ladislavella catascopium
Ladislavella hinkleyi
Lambiella insularis
Lamprocapnos spectabilis
Larus brachyrhynchus
Lasioglossum absimile
Lasioglossum lusorium
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