| Popis: |
Chorological phenomena are very important for the differentiation of the Mesobromion erecti associations in western and central Europe. We recognized several associations of grasslands specific of calcareous brown-soils (on marl) in a range from the southwest of France to Switzerland and the Boulonnais, which correlated with a floristic impoverishment. Beyond the north and the east of France, the characteristic species disappear: the associations of marl grasslands cannot be differentiated. |
