There are 12 major plant divisions, and these are:
Hepaticophyta / Marchantiophyta (Liverworts)
Bryophyta (Mosses)
Anthocerophyta (Hornworts)
Psilophyta (Whisk Ferns)
Lycophyta / Lycopodiophyta (Clubmosses and Spikemosses)
Arthrophyta / Equisetophyta / Sphenophyta (Horsetails)
Pterophyta / Pteridophyta (Ferns)
Gnetophyta (Gnetophytes)
Cycadophyta (Cycads)
Ginkgophyta (Ginkgo and Maidenhair)
Coniferophyta (Conifers)
Anthophyta / Magnoliophyta (Flowering plants )
Ferns (Pterophyta)
Whisk Ferns (Psilophyta)
Horsetails (Arthrophyta)
Club Mosses (Lycophyta)
Unlike mosses, ferns and related species have a vascular system, but like mosses, they reproduce from spores rather than seeds. The ferns are the most plentiful plant division in this group, with 12,000 species. Other divisions (the fern allies) include Club mosses or Lycopods (Lycopodiophyta) with 1,000 species, Horsetails (Equisetophyta) with 40 species, and Whisk ferns (Psilophyta) with 3 species.
Ferns and other seedless vascular plants have a much larger and more conspicuous sporophyte, with vascular tissue. Many have well-differentiated roots, stem, and leaves. The shift to a dominant sporophyte leads to the evolution of trees.
Having a hard time on studying about plants? Check out some basic botanical terms at Learnplantsnow.com.