Tracheophyta
"The vascular plants. Terrestrial plants with complex differentiation of organs into leaves, roots, and stem. Motile cells, if present, (and then only in the form of male gametes) are elongate or (if wound up) top-shaped, propelled by many cilia. The vascular plants have well-developed strands of conducting tissue for the transport of water and organic materials. The main trends of evolution in the vascular plants involve a progressive reduction in the gametophyte, which is green and free-living in ferns but heterotrophic and more or less enclosed by sporophytic tissue in the others; the loss of multicellular gametangia and motile sperm; and the evolution of the seed."
Biology of Plants, Fourth Edition, Worth Publishers Inc., Stanford University, Peter H. Raven and Helena Curtis, ©1971
| Taxonomic Hierarchy | |
| Kingdom | Plantae – Vegetal, plants |
| Subkingdom | Viridaeplantae – green plants |
| Infrakingdom | Streptophyta – land plants |
| Division | Tracheophyta – vascular plants |
| Direct Children: | |
| Subdivision | Pteridophytina – pteridophytes |
| Subdivision | Spermatophytina – spermatophytes, seed plants |
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