the morus alba “fruitless”, commonly calledornamental frost,is a deciduous tree belonging to the moraceae family. has a thick and very wide foliage. the elongated trilobed leaves are intense green, becoming yellow in the autumn months. flowering, which takes place between April and May, does not fruit because sterile, so as not to create discomforts due to the fall of the fruits. lives practically in all kinds of land even the poorest and silicei. resists well cold, warm, smog and requires little water, loves sunny positions, is not affected by important diseases. It is a type of plant that lends itself very well to be formed on the roof.