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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 | Embryophyta
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| Division | Tracheophyta
– vascular plants, tracheophytes |
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| Subdivision | Polypodiophytina
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| Class | Polypodiopsida
– leptosporangiate ferns |
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| Subclass | Ophioglossidae
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| Order | Ophioglossales
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| Family | Ophioglossaceae
– adder's-tongue |
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| Subfamily | Ophioglossoideae C. Presl |
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Direct Children: |
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| Genus | Cheiroglossa C. Presl
– hand fern, dwarf staghorn | |
| Genus | Ophioderma (Blume) Endl.
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| Genus | Ophioglossum L.
– adder's-tongue, adderstongue | |
| Genus | Rhizoglossum C. Presl
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