subdivision Pteropsida

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Noun1.subdivision Pteropsida - used in former classifications to include all ferns and flowering plants and divided into the three classes Filicinae and Gymnospermae and Angiospermae
division - (botany) taxonomic unit of plants corresponding to a phylum
division Tracheophyta, Tracheophyta - in former classifications: comprising plants with a vascular system including ferns and fern allies as well as seed plants