Sphenophyta, commonly known as horsetails, are a unique group of plants that belong to the family Equisetaceae. These plants are characterized by their jointed stems and whorled branches, resembling little trees or shrubs. They are considered primitive vascular plants, with a history that dates back to the Paleozoic era, making them one of the oldest plant lineages still existing today.
Horsetails typically grow in damp or wet environments and can often be found near streams and marshes. Their stems are hollow and contain silica, which gives them a rough texture. This characteristic, along with their ability to reproduce through spores instead of seeds, sets them apart from most other plants.
Overall, sphenophyta are fascinating plants that not only play important ecological roles but also serve as reminders of the evolutionary history of plant life on Earth.