Closed mesophile grasslands, usually rich in Bromus erectus and orchids, of the periphery of the Mediterranean basin in Catalonia, the eastern Pyrenees, the Corbières, the Causses, Provence, the southwestern Alps and the northern Apennines. Many are comparatively dry and have sometimes been included in the Xerobromion.
Formations of the supra-Mediterranean and montane zones of the mountains of Catalonia and of the supra-Mediterranean and montane zones of the Pyrenees, where the absence of Brachypodium pinnatum separates them from the more western formations of 34.322-34.323.