 On the slopes of the Andes, in addition to the scattered tola desert brush, grasses are found.The central valley is characterized by several species of cacti, the hardy espinos, the Chilean pine, the southern beeches and the copihue, a red bell-shaped flower that is Chile's national flower.In southern Chile, south of the Biobío River, heavy precipitation has produced dense forests of laurels, magnolias, and various species of conifers and beeches, which become smaller and more stunted to the south.