This study examines the propositions that: 1. in high-mountain areas, the differentiation of vegetation units at the landscape (supra-ecosystem) scale is closely linked to variations in the geomorphology of slopes and valley bottoms across various morphodynamic units; 2. morphodynamic units constitute the natural boundaries of the vegetation-related landscape units; 3. different types of geomorphological unit at the landscape scale are characterized by the vegetation types growing on them. These propositions were tested by comparing overlays of digital maps of vegetation and geomorphology. A characteristic combination of plant communities was determined for each of the five types of morphodynamic unit identified.