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Colaconematales
Order, Alga, Marine, terrestrial
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Coleochaetales
Order, Alga, Marine, terrestrial
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Coleochaetophyceae
Class, Alga, Marine, terrestrial
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Compsopogonophyceae
Class, Alga, Marine, terrestrial
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Compsothamnion
Genus, Alga, Marine
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Compsothamnion decompositum
Species, Alga, Marine
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Compsothamnion gracillimum
Species, Alga, Marine
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Compsothamnion thuyoides
Species, Alga, Marine
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Corallina
Genus, Alga, Marine
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Corallina caespitosa
Species, Alga, Marine
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Corallina elegans
Species, Alga, Marine
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Corallina officinalis – Coral Weed
Species, Alga, Marine
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Corallinaceae – Coralline crusts
Family, Alga, Marine
Coralline encrusting algae, Pink algae, Pink encrusting algae
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Corallinales
Order, Alga, Marine
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Corallineae
Tribe, Alga, Marine
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Cordylecladia
Genus, Alga, Marine
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Cordylecladia erecta
Species, Alga, Marine
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Crouania
Genus, Alga, Marine
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Crouania attenuata
Species, Alga, Marine
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Crucigenia
Genus, Alga, Marine, terrestrial