-
Abies – Fir
Genus, Conifer, Terrestrial
-
Abutilon
Genus, Flowering plant, Terrestrial
-
Acacia
Genus, Flowering plant, Terrestrial
-
Acaena
Genus, Flowering plant, Terrestrial
-
Acanthococcus
Genus, Alga, Terrestrial
-
Acanthus
Genus, Flowering plant, Terrestrial
-
Acer – Maple
Genus, Flowering plant, Terrestrial
-
Achillea
Genus, Flowering plant, Freshwater, terrestrial
-
Aconitum – Monk's-Hood
Genus, Flowering plant, Terrestrial
-
Acrochaetium
Genus, Alga, Marine, terrestrial
-
Actinastrum
Genus, Alga, Marine, terrestrial
-
Actinochloris
Genus, Alga, Terrestrial
-
Actinotaenium
Genus, Alga, Terrestrial
-
Acutodesmus
Genus, Alga, Marine, terrestrial
-
Adonis
Genus, Flowering plant, Terrestrial
-
Aegagropila
Genus, Alga, Marine, terrestrial
-
Aegopodium
Genus, Flowering plant, Terrestrial
-
Aeonium
Genus, Flowering plant, Terrestrial
-
Aesculus
Genus, Flowering plant, Terrestrial
-
Aethusa
Genus, Flowering plant, Terrestrial