This association typifies tall and close-canopy stands dominated by Adenostyles alliariae which is accompanied by several species of subalpine tall forbs. The stands occur in wet places such as along streams, in depressions, and in places with large snow accumulation. This vegetation type is found both above and below the timberline in the Krkonoše and Hrubý Jeseník Mountains. In some places it occupies large canopy openings in subalpine spruce forests.