At the subalpine level, above the highest limit of the forests, only bushes such as the alpine grey willow can be found. It is possible to find it on the north slopes of the Sirac, on the route between Chabournéou and Vallonpierre. It's milky green colour can be spotted from afar. If you look closer, you will notice its main characteristic, which is a silky hair that is on both sides of the leaves. One reasons for this peculiarity might be to store as much moisture as possible to avoid desiccation. Despite its abundance here, it should not be forgotten that it is not such a common species!