This association includes tall-herb meadows in the floodplains of lowland rivers which are mown irregularly only in some years, or even abandoned for a few years. Under such conditions tall herbs such as Pseudolysimachion maritimum appear and become increasingly frequent. Soils and flooding regime of these meadows are similar to those of the Cnidio dubii-Deschampsietum cespitosae. These meadows are mainly found along the Labe river in central and eastern Bohemia as well as the Dyje river in southern Moravia.