The alliance Salicion albae comprises open willow and willow-poplar riparian forests dominated by the arborescent species Salix alba and .. euxina as well as their hybrid and in places also Populus nigra. In some places in southern Moravia these stands contain an admixture of P. alba, and occasionally also Fraxinus angustifolia. This vegetation type occurs on deep loamy alluvial soils, usually on sites that are better protected from disturbances by the current than the sites of the Salicion triandrae alliance. They also develop as stages of secondary succession on abandoned flooded meadows and in other wet habitats in the floodplains.