Sphenopsida

plural noun
Sphe·​nop·​si·​da | \ -psədə \

Definition of Sphenopsida

: a subdivison of Tracheophyta comprising vascular plants (such as the horsetails and extinct related forms) with jointed stems, small leaves usually in whorls at distinct stem nodes, and sporangia in sporangiophores and including the orders Hyeniales, Sphenophyllales, and Equisetales — compare lycopsida , psilopsida , pteropsida

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History and Etymology for Sphenopsida

New Latin, from sphen- + -opsis + -ida

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Cite this Entry

“Sphenopsida.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Sphenopsida. Accessed 17 Apr. 2021.

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