common mare's tail, is a perennial aquatic plant found in wetlands, ponds, and slow-moving streams. It features cylindrical, hollow stems that can grow up to 60 cm tall, with whorls of small, scale-like leaves around each joint. The plant reproduces through both seeds and rhizomes, making it quite resilient and often forming dense colonies. Mare's tail is known for its high tolerance to various water conditions, including polluted waters, and is used in some regions for phytoremediation to help clean up water bodies.