class_psilopsida
1. [ noun ] (biology,botany) whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
Synonyms: Psilotatae class_Psilotatae Psilopsida
Related terms: class Pteridophyta Psilotales
Similar spelling:   class_Pinopsida
  class_Filicopsida
  class_Bryopsida
  class_Psilotatae
  class_Sphenopsida
  class_Cephalopoda
  class_Pauropoda
  class_Hepaticopsida