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3,375 species in Joshua Tree National Park
Aphytis holoxanthus
Apiastrum angustifolium
Apiocera aldrichi
Apiocera volucra
Aplanusiella californiensis
Apleurus angularis
Aquilegia chrysantha
Aquilegia coerulea
Arceuthobium divaricatum
Arctostaphylos glandulosa
Arctostaphylos pungens
Arenochroa flavalis
Arethaea brevicauda
Artema atlanta
Artemisia californica
Artemisia douglasiana
Asagena medialis
Asclepias californica
Asclepias vestita
Asemosyrphus polygrammus
Ashmeadiella cubiceps
Ashmeadiella eurynorhyncha
Ashmeadiella gillettei
Ashmeadiella leucozona
Ashmeadiella meliloti
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