• Definition for "class psilopsida"
    • whisk ferns; comprising your family Psilotaceae or Psilotatae:…
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  • Hypernym for "class psilopsida"

class psilopsida definition

  • noun:
    • whisk ferns; comprising your family Psilotaceae or Psilotatae: vascular plants without any origins, partial if any leaf differentiation, and standard spore sacs
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