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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 | Polypodiidae
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| Order | Polypodiales
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| Suborder | Polypodiineae
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| Family | Dryopteridaceae
– wood ferns, woodferns |
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| Subfamily | Elaphoglossoideae (Pic. Serm.) Crabbe, Jermy & Mickel
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| Genus | Elaphoglossum Schott ex J. Sm.
– tonguefern |
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| Species | Elaphoglossum petiolatum (Sw.) Urb. – graceful tonguefern |
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Direct Children: |
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| Variety | Elaphoglossum petiolatum var. dussii (Underw. ex Maxon) Proctor
– Duss' tonguefern | |
| Variety | Elaphoglossum petiolatum var. petiolatum (Sw.) Urb.
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