Pteridophyte is a word used to describe a group of vascular plants that reproduce via spores rather than seeds. Some common synonyms for Pteridophyte are ferns, horsetails, and clubmosses. Additionally, they are sometimes referred to as primitive plants, as they have been present on Earth for over 400 million years. The name Pteridophyte comes from the Greek words "pteron" meaning wing and "phyton" meaning plant, which refers to the fern-like appearance of these species. Other synonymous terms used to describe this group of plants include fern allies, seedless vascular plants, and cryptogams. These plants have unique features that make them a critical part of ecosystems, and they have been used for medicinal purposes and as food sources throughout history.