Slategrass

This large, gray-green grass grows up to 5 feet (1.5 meters) tall. The long, narrow stalks grow in thin clumps that are durable.

When mature, the end of the stem eventually transforms into a small, slate spikelet.

During the early winter, it produces copious amounts of pollen; it does not cause many allergic reactions, and after flowering, it is left with a handful of giant grains.