The delimitation should be based on the presence of vegetation of the syntaxa given above. The cover of Calluna should not exceed 50% of dwarf shrub cover (if Calluna cover exceeds 50% the vegetation should be considered under European dry heaths of planar to montane zones [4030]). Smaller areas with divergent vegetation may be included. Coastal vegetation of this type occurring in dune complexes should be considered under Humid dune slacks of coastal dunes (2190) zu erfassen.