As its name suggests, Tufted Hair Grass grows in a tufted mound of narrow foliage. Deschampsia cespitosa is a cool-season native grass that is semi-evergreen where winters are mild. It sends up long stalks in early summer that are topped by a multitude of airy, light-green inflorescences.  Large groupings of plants can be used as a ground cover. It is native to both North America and Eurasia where Deschampsia cespitosa can be found in moist areas such as bogs and woodlands. Great rain garden plant.