 The use of either term is allowed under the International Code of Botanical Nomenclature, and both are commonly used in scientific literature.The main Divisions of land plants, in the order in which they probably evolved, are the Marchantiophyta (liverworts), Anthocerotophyta (hornworts), Bryophyta (mosses), Filicophyta (ferns), Sphenophyta (horsetails), Cycadophyta (cycads), Ginkgophyta (ginkgo)s, Pinophyta (conifers), Gnetophyta (gnetophytes), and the Magnoliophyta (Angiosperms, flowering plants).The flowering plants now dominate terrestrial ecosystems, comprising 80% of vascular plant species.