This association includes stands of Sagittaria sagittifolia and/or Sparganium emersum. In still water both species usually occur in an emergent form, while in rivers they occur in a form with leaves that are partly submerged and partly float on the water surface. This vegetation type is typical of eutrophic water bodies such as fishponds, oxbows, alluvial pools and lentic river sections. Water is usually 20–80 cm deep, but in streams it can be up to 120 cm deep. In summer water table can recede so far as to expose the bottom. Dominant species are capable of regeneration from their underground organs after a period of substrate desiccation. This association occurs in lowlands and colline areas.