Vegetation dominated by the tall sedge Carex buekii occurs on the middle and lower courses of rivers. It is confined to loamy-sandy fluvial sediments on river banks, which are not directly exposed to the current. Usually this association occurs behind the zone of riverine reed vegetation dominated by Phalaris arundinacea (Rorippo-Phalaridetum arundinaceae association), which directly adjoins the stream. It is found on terraces and levees that are a few dozen centimetres above the mean annual water level. These habitats are occasionally flooded, but for a shorter period than the stands of Phalaris arundinacea. This vegetation type occurs along different rivers in lowland to submontane areas of the Czech Republic.