Watergrass

This average-sized, lime green grass grows up to 2 feet (61.0 cm) tall. The long, tapering stalks grow in large clumps that are resilient.

When mature, the end of the stem eventually transforms into a large, green puff.

During the early summer, it produces lots of pollen; it does not cause many allergic reactions, and after flowering, it is left with excessive amounts of small grains.