This association is dominated by low-growing annual graminoids (e.g. Carex bohemica, Coleanthus subtilis, Eleocharis ovata and Juncus bufonius) and dicots. It is most common on exposed fishpond bottoms, and less frequently it also occurs on sediment accumulations on river banks. This is the most moisture-demanding and most acidophilous association of the Eleocharition ovatae alliance. Usually it occurs on a 5–30 cm deep layer of wet, loamy to loamy-clayey mud. It is most frequent in mid-altitude areas of Bohemia and western Moravia.