42.21 - Niveau 4 : Pessières sub-alpines des Alpes
Description
Picea abies forests of the lower sub-alpine level, and of anomalous stations in the montane level, of the outer, intermediate and inner Alps; in the latter, they are often in continuity with the montane spruce forests of 42.22. The spruces are often stunted or columnar; they are accompanied by an undergrowth of decidedly sub-alpine affinities.
Taxons (Liens actifs si espèces présentes)
42.213 - Niveau 5 : Pessières subalpines à sphaignes
Description
Sphagnum-rich Picea abies forests of more or less peaty, humid substrates with Listera cordata, Sphagnum acutifolium, S. quinquefarium, S. girgensohnii.