Greenerygrass

This giant, green grass grows up to 30 feet (9.1 meters) tall. The oblong stalks grow in sparse patches that are flexible and they spread and grow quickly.

When mature, the end of the stem eventually transforms into a medium-sized, lime tuft.

During the late autumn, it produces very little pollen; it does not cause many allergic reactions, and after flowering, it is left with plenty of medium-sized grains.