The dynamics of the riparian vegetation of Central European rivers are shown by the example of Rumex stenophyllus LEDEB. This continental dock species has spread along the Elbe up to the north during the last decades. Rumex stenophyllus is able to germinate under water, the seedlings are able to establish along the riverbanks. A comparison with relevés from the same riverbank sections published by REINHOLD TÜXEN shows that Rumex stenophyllus becomes part of Bidentetea communities like Xanthio albini-Chenopodietum rubri or Rumicetum maritimi without any change in their structure.
