Hippuris vulgaris, Mare's tail, has the appearance of a pleasant green bottlebrush growing in patches found primarily in the shallow areas of ponds, lakes, streams or any wet muddy shore where water levels fluctuate. The flowers of Hippuris vulgaris are inconspicuous and the leaves and stems vary in shape depending on whether they are growing in submergent or emergent conditions. The underwater portions of Mare's tail are flexible and develop longer leaves. The emergent portions tend to be stiff and more erect with shorter more narrow leaves. Mare's tail is a native substitute for the aggressive Parrot feather.