Sinonim sphenopsida

English Thesaurus

1. horsetails and related forms (noun.plant)

hypernym	:	class,
definition	:	(biology) a taxonomic group containing one or more orders (noun.group)

member holonym	:	equisetales, order equisetales,
definition	:	lower tracheophytes in existence since the Devonian (noun.plant)

member meronym	:	division pteridophyta, pteridophyta,
definition	:	containing all the vascular plants that do not bear seeds: ferns, horsetails, club mosses, and whisk ferns; in some classifications considered a subdivision of Tracheophyta (noun.plant)