Surveys carried out on the area present a territory that is covered up to the mountain crests in stretches of broad-leafed trees, with beech woods near the summits and chestnut trees, mostly fruit bearing, in the lower areas.
Depending on the direction it is facing, and the exposure, we also find extensive woods with mixed species, Pubescent oak, turkey oak, hornbeam and other plants typical of the area.
At 800-900 metres above sea level or more we find the beech tree. It can be recognized by its smooth greyish trunk. The chestnut woods provide a spectacular landscape that is well suited to animals. These majestic plants are age-old and have guaranteed, with their fruit, the survival of numerous mountain people.
Other common species, for example turkey oak trees, are coppiced, and the bark provides tannins that are useful in the preparation of leather, while the hornbeam is cut to make yokes and for producing excellent charcoal. Near abandoned ruins, we find numerous wild fruit trees, or trees that were once parts of orchards, like apple, pear, cherry and walnut, many belonging to ancient varieties that are hardly known of today.
The presence of man has radically changed the vegetation of the Apennines, first by using the land intensively, and then by massive reforestation for the reproduction or the recovery of the environment, which started in the 19th century. Therefore, we can note the presence of Black pine, Silver fir, and Douglas fir trees, a plant that grows quickly, reaches 100 metres in height and is used widely in different industries.
In Giogo-Casaglia, we also find roughly forty species of orchids, each specific to a certain environment. Some species of orchids have a special relationship with its pollinator, which is specific, and it attracts using different strategies that change continually, while symbiotic fungi guarantee germination. It is for this reason that orchids are sensitive to changes in the environment, and often risk extinction.