| NOUN | plant | class Sphenopsida, Sphenopsida, Equisetatae, class Equisetatae | horsetails and related forms |
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| Meaning | horsetails and related forms. | |
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| Synonyms | Sphenopsida, Equisetatae, class Equisetatae | |
| Member of | Pteridophyta, division Pteridophyta | Containing all the vascular plants that do not bear seeds |
| Members | Equisetales, order Equisetales | Lower tracheophytes in existence since the Devonian |
| Broader | class | (biology) a taxonomic group containing one or more orders |