Siliceous, cool, damp screes of the subalpine and alpine levels of Alps, Carpathians, Pyrenees and Corsica with Androsace alpina, Achillea nana, Oxyria digyna, Geum reptans, Saxifraga bryoides, Ranunculus glacialis, Linaria alpina, Oreochloa disticha, Silene acaulis. Vegetation of alliance Androsacion alpinae.