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Ammophila
Genus, Flowering plant, Terrestrial
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Amphikrikos
Genus, Alga, Terrestrial
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Amsinckia
Genus, Flowering plant, Terrestrial
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Anagallis – Pimpernel
Genus, Flowering plant, Freshwater, terrestrial
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Anaphalis
Genus, Flowering plant, Terrestrial
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Anchusa
Genus, Flowering plant, Terrestrial
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Anemone
Genus, Flowering plant, Freshwater, terrestrial
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Anethum
Genus, Flowering plant, Terrestrial
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Angelica
Genus, Flowering plant, Freshwater, terrestrial
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Ankistrodesmus
Genus, Alga, Terrestrial
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Ankyra
Genus, Alga, Terrestrial
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Anthemis
Genus, Flowering plant, Terrestrial
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Anthoxanthum
Genus, Flowering plant, Terrestrial
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Anthriscus
Genus, Flowering plant, Terrestrial
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Anthyllis
Genus, Flowering plant, Terrestrial
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Antirrhinum
Genus, Flowering plant, Terrestrial
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Apatococcus
Genus, Alga, Terrestrial
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Apera
Genus, Flowering plant, Terrestrial
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Aphanochaete
Genus, Alga, Terrestrial
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Apiocystis
Genus, Alga, Terrestrial