An international Wadden Sea Working Group is compiling the ecological information, mainly derived from literature, on the Danish, German and Dutch Wadden Sea area. In this paper some results of the compilation and survey activities of the Terrestrial Botany section of this Working Group are presented. In a special project the data on vegetation and landscape of the Wadden Sea islands and mainland coastal areas, combined with an interpretation of aerial photography, have been integrated in a map at scale 1:100,000. A brief survey of the mapping procedure is presented, followed by an enumeration of the map legend’s landscape- and vegetation-units with their syntaxa and principal succession series in a schematic presentation. The (colour) map will be the first document to show the overall geographical distribution of the vegetation and landscape types of the – from a conservation point of view so important – Wadden Sea area.