Spring communities of lime-poor waters of the Palaearctic domaine dominated by bryophytes, mostly characteristic of northern upland and high montane, alpine or subalpine levels, also locally of well-lit lowland sites.
Spring communities of montane, sometimes collinar, lowland or subalpine, well-lit, lime-poor waters of the Palaearctic domaine dominated by mosses, in particular, Philonotis fontana, with Epilobium nutans, Epilobium obscurum, Epilobium palustre, Epilobium parviflorum, Montia fontana, Stellaria alsine, Galium uliginosum, Ranunculus repens, Veronica beccabunga, Equisetum fluviatile.