Threatened species of Lycopodiophyta

Threatened species of Microphyllophyta
Threatened species of Lycopodiophytina
Threatened species of club mosses
Endangered species of spike mosses
Threatened species of quillworts
Endangered species of scale trees
Threatened species of Lycophyta
Threatened species of lycophytes

Background

The pteridophytes (ferns and fern-allies) have been subdivided along a variety of different lines. The principal point of contention between various schemes for dividing pteridophytes above the family level seems to be at what point in the hierarchy are distinctions to be made. Different taxonomic systems treat the the lycopodiophytes as a single phylum within the group of ferns and fern-allies, or as a division or subphylum.