Family Equisetaceae, commonly known as horsetails, is a relatively small family of vascular plants that includes approximately 15 species. These plants are known for their long, hollow stems that have distinct jointed segments and produce spores rather than seeds for reproduction. They are found throughout the world in damp or wet habitats, often near water sources. Synonyms for Family Equisetaceae include the Equisetales, Pteridophyta, fern allies, and scouring rushes. These synonyms are often used interchangeably in literature and research related to these plants, and they all refer to the same classification of plants within the plant kingdom.