Brughierezza’s woods are a wooded area integrated in Roccolo’s Park. Topographic facts make suppose that the most fertile cultivated lands were divided  starting from Sempione’s road to north-east and south-west even on a part of Roccolo’s park area. Many areas has probably been remained wild like Brughierezza. In correspondece to that area, between Busto Garolfo, Parabiago, Casorezzo and Arluno, the regular layout of the fields, like we can obviously see starting from Sempione, stops. In the old tophographic maps (the ones before the urbanization and the buildng of Villoresi canal), we can notice that the roads, which seems to be almost parallel and oriented from north to east and from south to west, changes directions going from east to west. So we can suppose that those areas in the roman era have not been divided because of the low fecundity of the lands and the scarceness of the water courses. They were covered of woods and moors. The origin of the moors may hail from the destruction of the wood and so of the humus. The land, which has been eroded and impoverished by the rains, has allowed the settlement of the Burgo and other types of shurb. The toponym “Brughierezza” and other which are still in the cadastral maps of Arluno and Parabiago, like the name of the road near the “brughiera of Busto Garolfo” and also Busto Garolfo, which some authors make a reference to the Latin term “bustum”, that is arid and burnt land, testimony the existence (in Roccolo’s park) of moors which are missing between the end of XVIII century and the beginning of XIX century, replaced by the diffusion of the black locust, a northamerican species which was used for the tree planting because of its predispodition of growing in lands in which there are no other species of plants. Nowadays in that area we can still admire the original Pianura Padana’s plants like oak, flour, wood lily, Salomon’s seal and periwinkle. This areas are the natural habitat of Aesculapian snakes, shrewmouses, dormouses, owls, tawny owls, sparrowhawks and woodpeckers.

(Atlante della Biodiversità del Parco del Roccolo vol. n° 3: La flora)