Ulmus L., 1753 is a genus of the Ulmaceae family, which includes elms, naturally spread in Europe, Asia and North America, and widely used as ornamental plants and especially in forestry and arboriculture. They can reach a high of 25-30 m. Their leaves are deciduous, simple, eggshaped with serrated margins and with a strongly asymmetrical blade. The flowers are hermaphrodite, with a superior ovary and gathered in inflorescences. The fruit is a samara.
There are 4 species of this tree in Italy: Ulmus glabra widespread in the thermophilic forests of the entire peninsula, Ulmus minor present in every region, Ulmus canescens in the southern areas, and Ulmus laevis distributed in the humid forests of northern and central Italy.