Hippuris vulgaris aka Mare's Tail

Hippuris vulgaris, commonly known as mare's-tail or common mare's-tail, is a common aquatic plant found in Eurasia and North America. It can be found in a range of habitats, from shallow ponds and streams to mud flats. This perennial herb has soft upright green foliage that grows in whorls around stems, reaching up to 30 cm in height. In summer, it may produce inconspicuous green-yellow flowers. The plant prefers non-acidic waters and can thrive in various soil types, including sandy, loamy, and clay soils with acidic, neutral, or basic pH levels. It can even grow in moist soil and water. Although sometimes mistaken for the non-flowering horsetail, Hippuris vulgaris is distinct in its characteristics. To control its growth, mechanical methods such as digging and removing roots are recommended, preferably in two stages before winter and in spring. This plant has been found to be a prolific methane emitter in wetland environments. Overall, Hippuris vulgaris is a useful plant that adds beauty to pond edges and bog gardens while requiring proper management to prevent unwanted spreading.