Koeleria glauca, commonly known as blue hair grass, is a grass species of the genus Koeleria. It grows in dunes and other sandy places. It is mainly distributed in eastern Central Europe, with its western outposts in the coastal dunes of Jutland and inland dunes in the Rhine Valley. The plants foliage is bluish-grey in colour and is 15 to 30 centimetres in height. Flowers bloom from May to July and can be 35 to 55 centimetres high.