TAXONOMY, Class;
PSILOTOPSIDA
D.H. Scott pub. Stud. Foss. Pl., ed. 2: 616, 631, 632. 1909.


Kingdom  Plantae - Plants
   Division   Psilophyta - Whisk-ferns
    Class   Psilopsida

      Order   Psilotales
        Family  Psilotaceae - Whisk-fern  Family

            Genus   Psilotum
             Species  nudum Part of Taxonomy Collection

This little Class contains only a few species, belonging to three Families:

PSILOTOPSIDA PSILOTACEAE Bernhardia 2 species
whisk ferns   Psilotum 6 species
  Tmesipteris 10 species