Formations of Mediterranean, thermo-Atlantic and Macaronesian entirely or partially summer-dry ponds, pools and ditches with Isoetes spp., Marsilea quadrifolia, M. strigosa, Pilularia globulifera, P. minuta, Mentha pulegium, Lythrum hyssopifolia s.l., Trifolium filiforme, Peplis erecta, Teucrium cravense, Serapias lingua, Juncus bufonius, J. capitatus, J. pygmaeus, J. fasciculatus, Scirpus savii, sometimes (rocky edges of fast rivulets), Spiranthes aestivalis and Anagallis tenella.