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4,118 species in Yellowstone National Park
Larus glaucoides
Lasioglossum inconditum
Lecidea protabacina
Lecidella patavina
Leiothlypis peregrina
Stereocaulon alpinum
Stenodynerus anormis
Stelis calliphorina
Sphagnum russowii
Spergularia rubra
Sparganium angustifolium
Sisymbrium loeselii
Silene parryi
Sialia mexicana
Semanotus amethystinus
Scotochroa basalis
Schizachne purpurascens
Schistidium papillosum
Scaeva affinis
Saxifraga flagellaris
Saxifraga debilis
Lepidozia reptans
Packera pseudaurea
Rumex venosus
Rhizoplaca phaedrophthalma
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