Mesophile montane forests with wintergreens occupying a broad belt on the southwestern flank of the Alps from Dauphin‚ to the Maritime Alps, differentiated from the forests of unit G3.44 by the absence of Erica herbacea; the undergrowh usually comprises Arctostaphylos uva-ursi, Centaurea scabiosa, Tolpis staticifolia (Hieracium staticifolium), Calluna vulgaris, Polygala chamaebuxus, Monotropa hypopitys, Goodyera repens, Epipactis atrorubens, Neottia nidus-avis.