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2,976 species in Lassen Volcanic National Park
Andrena vierecki
Anomalon californicum
Anthoxanthum nitens
Aphyllon franciscanum
Aphyllon purpureum
Arceuthobium californicum
Arenaria interpres
Arnica fulgens
Artemisiospiza nevadensis
Asio flammeus
Askellia pygmaea
Astraeus pteridis
Balsamorhiza deltoidea
Barkworthia stillmanii
Boechera depauperata
Boechera pinetorum
Boechera sparsiflora
Boechera suffrutescens
Boletus rex-veris
Boletus subalpinus
Bombus californicus
Bombus huntii
Botaurus lentiginosus
Bovista californica
Brachytheciastrum velutinum
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