When autumn arrives, the trees in the Park, in particular the large plane trees, such as the monumental specimen found in the meadow in front of the Paggeria, and the spectacular ginko biloba near the Locanda, begin to change color: it is the “foliage”, a natural phenomenon that marks the approach of winter and is due, depending on the species, to the decrease in temperatures and the length of the day. Chlorophyll, which gives the green color to the leaves (produced in abundance in the spring and summer vegetative phase thanks to the light and heat), progressively decreases until it disappears, and here is that the other pigments present in the leaves, such as the xanthophylls, yellow in colour, and the carotenes, orange in colour, normally hidden, become visible. In addition to yellow and orange, the leaves can also take on colors ranging from red to purple to gray, thanks to the presence of anthocyanins, responsible for the blue color of many fruits, such as blueberries, and useful for protecting against ultraviolet rays. The change in color obviously precedes the detachment of the leaves themselves (phenomenon of abscission), due to the progressive obstruction of the veins in which the transport of incoming and outgoing fluids takes place. It is the beginning of the rest phase, necessary in our latitudes in the autumn and winter seasons, during which the trees stop growing.