The high temperature of the soil and air favours the occurrence of so-called xerophytes - dry grasses with narrow bristly leaves. These include feather grasses, very characteristic wind-waving grasses which make grasslands look like Asian steppes. There are as many as 300 species of feather grasses in the world, but in Poland, there are only four wild ones, and two of them grow in Owczary. These are Stipa Joannis and Stipa capillata. These grasses were once used for dry bouquets because of their striking appearance. Nowadays, all species of feather grasses are protected in Poland, and Stipa Joannis is included in the Polish Red Book of Plants.