Leaves are covered on both sides by minute soft hairs. Water primroses have conspicuous yellow flowers . The flowers have four or five petals. Water grass W ater grass is a true aquatic grass that looks very much like lawn grass. It grows floating and trailing across the water.
Water grass is found in shallow, slow moving waters.
T he slender main stems of water grass are submersed, while most of the leafy upper branches are emersed. Water grass often forms floating mats. Often the stems are long with many entwined branches. The leaves of water grass are flat, thin, and short. The leaves are sandpapery on the upper surface.