Psilotales

plural noun

Psi·​lo·​ta·​les

: an order of lower tracheophytes (subdivision Psilopsida) having a dichotomously branched sporophyte that is divided into aerial shoot and rhizome, lacks true roots, and has few or minute leaves, and having a gametophyte that is subterranean and free from chlorophyll see psilotaceae

Word History

Etymology

New Latin, from Psilotum + -ales

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