C3.55222 - Niveau 7 : Communautés de graviers des cours d'eau pyrénéo-cantabriques à Calamagrostide
Description
Assemblies of herbaceous or suffrutescent pioneering plants colonizing gravel beds of streams with an alpine, summer-high, flow regime in the montane zone of the Pyrenees and the Cantabrian chain, with Calamagrostis pseudophragmites and Erucastrum nasturtiifolium.