1. The main plant is the sporophyte.
2. The body can be divided into roots, stems and leaves.
3. Leaves are large, green, pinnately compound.
4. Young leaves have sarcinate vernation or whorls.
5. Their spermatozoa are multi-flagellated and motile.
6. They are heterosporous or uninucleate.
7. Heteromorphic or unequally shaped genera are seen.