What are arthrophytes?

Arthrophytes, commonly known as horsetails, are a group of vascular plants belonging to the genus Equisetum. They are characterized by their jointed stems, hollow internodes, and whorled leaves, which give them a distinctive appearance. Horsetails are considered living fossils, as they have existed since the Carboniferous period, and they thrive in moist environments, often found in damp, sandy soils. Additionally, they are known for their high silica content and are sometimes used historically for abrasive purposes.