This vegetation type consists of dense and species-poor stands of Rumex alpinus, a broad-leaved perennial neophyte introduced from the high mountain ranges of central Europe. It occurs on deep, nutrient-rich, mesic to wet soils in the areas above the timberline or in the montane belt. Most often its stands are found around mountain huts and abandoned stables. They occur in the Jizerské hory, Krkonoše and Orlické hory Mountains.