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| Kingdom | Plantae
– plantes, Planta, Vegetal, plants |
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| Subkingdom | Viridiplantae
– green plants |
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| Infrakingdom | Streptophyta
– land plants |
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| Superdivision | Charophyta
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| Division | Charophyta
– green algae, charophytes, brittleworts, stoneworts |
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| Class | Conjugatophyceae
– conjugating green algae |
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| Order | Desmidiales
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| Family | Desmidiaceae
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| Genus | Staurastrum Meyen Ex J. Ralfs, 1848
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| Species | Staurastrum orbiculare Ralfs |
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Direct Children: |
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| Variety | Staurastrum orbiculare var. depressum Roy and Biss.
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| Variety | Staurastrum orbiculare var. extensum Nordst.
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| Variety | Staurastrum orbiculare var. hibernicum West and West
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| Variety | Staurastrum orbiculare var. orbiculare Ralfs
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| Variety | Staurastrum orbiculare var. protractum Playfair
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| Variety | Staurastrum orbiculare var. ralfsii West and West
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