the vegetation of the gorges
On soils rich in stony and gravelly materials at the base of cliffs, in the Natisone Valleys, develop fresh and humid throughout most of the year the picturesque forests of the gorge, from hilly to sub-mountain. They should be interpreted as lasting stages, that is, incapable of further land evoluzioni.L'accumulo end, advanced humidification, the high nitrogen content, the high humidity does not even exclude an average high temperature in summer thanks to high insolation. The forest area, therefore, it is very rich in species: sycamore, maple, Norway maple, hornbeam, chestnut, beech, ash, cherry, lime stranded, platifillo linden, oak, and, in the lower layers, flowering ash, hornbeam and rowan. In the Natisone valley, especially along the gorge Pradolino, you can see the rare Euonymus latifolia and Staphylea pinnata. The ground flora is characterized by species with large leaf blades: aconite, Actea, dental and like species such wallflower or the pope currency which should not restrict the leaf surface to save water, given the humidity average, but extend it to promote maximum use of light in areas with a low luminosità.Il rocky soil, moisture and darkness promote the development of fern, which sometimes take on such dimensions as to approach, albeit very vaguely, to those of tree ferns tropical. They are cited the dog language, rowed Aculeato, but also frequent male fern and the female fern, along with rarer Dryopteris Pseudomas.