Found 1 items, similar to psilopsida.
English → English (WordNet) Definition: Psilopsida Psilopsida n : whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs [syn: class Psilopsida , Psilotatae, class Psilotatae]