Formations of Mediterranean temporarily inundated or wet terrain, including karstic pools, often highly ephemeral, dominated by annual small herbs, among which Elatine spp. (Elatine macropoda, Elatine gussonei, Elatine pedunculata), Damasonium bourgaei, Nananthea perpusilla, Morisia monanthos, Blackstonia perfoliata, Samolus valerandi, Radiola linoides, Myosurus minimus, Laurentia gasparrinii, Laurentia tenella.