Bluegrass

This colossal, gray grass grows up to 38 feet (11.6 meters) tall. The needle-like stalks grow in extensive patches that are light and frail and they spread and grow quickly.

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

During the late autumn, it produces excessive amounts of pollen; it can cause severe allergic reactions, and after flowering, it is left with lots of small grains.