This association is dominated by two tall forbs, Aruncus vulgaris and Lunaria rediviva, which often co-occur but may form monodominant stands as well. It occurs on shaded screes, rocky slopes and in ravines, often in a close contact with ravine forests. While Aruncus vulgaris is more common on loamy soils affected by water erosion, Lunaria rediviva tends to attain dominance in places with accumulations of stones and boulders. Localities of this association are scattered in colline to montane areas of the Czech Republic, especially in deep river valleys.