Communities dominated by water crowfoots, Ranunculus peltatus, Ranunculus aquatilis, Ranunculus trichophyllus (Ranunculus confervoides, Ranunculus aquatilis var. diffusus), Ranunculus baudotii, Ranunculus hederaceus, Ranunculus rionii, Ranunculus ololeucos, Ranunculus omiophyllus (Ranunculus lenormandi), Ranunculus tripartitus, with both submerged and floating leaves, characteristic mostly of shallow Palaearctic waters with fluctuating water levels, susceptible to occasional drying. Crowfoot- dominated communities of unit C1.131are included.