The open structure of a water plant

Hippurus (Hippuris) vulgaris or mare’s-tail is a very common swamp and pond plant. This plant (a helophyte) is counted among the oxygen plants because the underwater leaves also produce a lot of oxygen and resemble water plague (Elodea). But the piece that raises a few decimeters above water looks like a small pine tree. Mare’s-tail can form large masses and continue spreading through means of rhizomes. Mare’s-tail grows preferably on clay soil and especially in brackish water.