Silvergrass

This huge, gray grass grows up to 25 feet (7.6 meters) tall. The very thin stalks grow in extensive patches that are strong and tough and they spread and grow quickly.

When mature, the end of the stem eventually transforms into a small, cyan tuft.

During the late summer, it produces an average amount of pollen; it can cause allergic reactions, and after flowering, it is left with plenty of large grains.