Psilotales

Từ điển WordNet v3.1 - WordNet Dictionary

noun

lower vascular plants having dichotomously branched sporophyte divided into aerial shoot and rhizome and lacking true roots
• Syn:
order Psilotales
• Hypernyms:
plant order
• Member Holonyms:
Psilopsida, class Psilopsida, Psilotatae, class Psilotatae
• Member Meronyms:
Psilotaceae, family Psilotaceae