This association includes grasslands with Calamagrostis arundinacea in forest clearings, at edges of screes and on rocky slopes. It replaces different types of beech, oak, oak-hornbeam and ravine forests on rocks of intermediate nutrient status. During succession on deforested sites the stage with Calamagrostis arundinacea can persist for a long time. In the Czech Republic this association occurs mainly at middle altitudes, although it can rarely develop in the subalpine belt.