This vegetation type is dominated by Potamogeton crispus, a submerged aquatic macrophyte occurring in both lentic and lotic water bodies, most frequently in fishponds, flooded sand pits, oxbows and alluvial pools, usually up to 1 m deep. This association is typical of eutrophic to hypertrophic water, including water containing organic or toxic pollutants. It is common from lowland to submontane areas across the Czech Republic.