Communities of the margins of lakes, rivers, brooks and swamps dominated by Phalaris arundinacea, pure or mixed with Phragmites australis, Carex acutiformis, Carex elata, Carex paniculata, Calamagrostis canescens, Mentha aquatica, very tolerant of drying, pollution and perturbance, susceptible of forming the landward belt of reedbeds and often characteristic of degraded systems. Vegetation of alliance Magnocaricion elatae, suballiances Caricenion rostratae and Caricenion gracilis.