Blazegrass

This colossal, orange-yellow grass grows up to 35 feet (10.7 meters) tall. The thick stalks grow in thin clumps that are sturdy and flexible and they overwhelm an area rapidly.

When mature, the end of the stem eventually transforms into a giant, dark purple tail.

During the early autumn, it produces very little pollen; it does not cause any allergic reactions, and after flowering, it is left with copious amounts of small grains.