| Noun | 1. | Tracheophyta - in former classifications: comprising plants with a vascular system including ferns and fern allies as well as seed plantsdivision - (botany) taxonomic unit of plants corresponding to a phylum kingdom Plantae, plant kingdom, Plantae - (botany) the taxonomic kingdom comprising all living or extinct plants Pteropsida, subdivision Pteropsida - used in former classifications to include all ferns and flowering plants and divided into the three classes Filicinae and Gymnospermae and Angiospermae |