Name: Pteridophyta sensu scictu; Monilophyta; Polypodiopsida; Filicopsida; Pteridopsida; Leptosporangiate ferns; Leptosporangiate ferns, Polypodiopsida; Ferns.
English: Ferns; Leptosporangiate ferns.
Botany: 7 Orders; 30 Families; 9000 Species; stems, leaves, roots; vascular plants; reproduce via spores and have neither seeds nor flowers; first fossils from 360 million years ago, Carboniferous.
Use: no economic importance; food; ornamental; remediating contaminated soils.
Culture: mythology; medicine; art.
Pteridophyta is a Phylum in the Plant Kingdom. In recent classifications it also includes the Equisetopsida. Lycopodiopsida are a separate clade at the phylogentic start of the tracheophyta, the vascular plants; the Leptosporangiate ferns form the major clade of the Pteridophyta.
In the Plant theory Leptosporangiate ferns are treated as a Class and named Polypodiidae. The biggest Order is Polypodiales, which can be divided in 3 Suborders, as shown below. Polypodiidae are divided tentatively in Phases.
3. Gleichniales, Hymenophyllales.
4. Cyatheales, Osmundales.
5. Poylpodiales 1, Polypodiales.
6. Poylpodiales 2, Blechnales.
7. Poylpodiales 0, Pteridales.