
The mountain forests, which like the one occupying the Polset valley, consist almost entirely of coniferous trees. These trees are in fact more resistant to the cold. The selection of species is influenced by the air humidity; at around 1,800 m, you will find the spruce, which then gradually makes way for the fir, and then in turn gives way to the larch and cembro pine on the southern slopes. Of course, the boundaries are not clear and we usually find a mixture of these four species with a predominance of one depending on altitude or exposure.