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Definition of Psilotales
1. Noun. Lower vascular plants having dichotomously branched sporophyte divided into aerial shoot and rhizome and lacking true roots. 
Exact synonyms: Order Psilotales
Generic synonyms: Plant Order
Group relationships: Class Psilopsida, Class Psilotatae, Psilopsida, Psilotatae
Member holonyms: Family Psilotaceae, Psilotaceae
Generic synonyms: Plant Order
Group relationships: Class Psilopsida, Class Psilotatae, Psilopsida, Psilotatae
Member holonyms: Family Psilotaceae, Psilotaceae



