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Noun: class Psilopsida
  1. Whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
    - Psilopsida, Psilotatae, class Psilotatae

Type of: class

Part of: division Pteridophyta, Pteridophyta

Nearest

class Pauropoda
class Pelecypoda
class period
class Phaeophyceae
class Phasmidia
class Pinopsida
class Placodermi
class Plectomycetes
class Polychaeta
class Polyplacophora
class Psilopsida
class Psilotatae
class Pteridospermopsida
class Pyrenomycetes
class Reptilia
class Rhodophyceae
class Sarcodina
class Scaphopoda
class Schizomycetes
class Scyphozoa
class Sphenopsida