Beyond Bosnian pine's zone follows an extensive zone, without trees, with alpine meadows, consisted by a mosaic of grassland ecosystems, depending on the topography, the slope and the orientation of the ground. In general, this alpine flora with more than 150 plant species, contains snow accumulation meadows, grassy swamps, alpine scree and rock crevices. On the meadows, the rocks and the steep slopes live most of the endemic Olympus' plants, among them some of the most beautiful wildflowers in Greece. Half of them are found only in the Balkans and 23 only in Olympus and nowhere else.