Eucalyptus is the general name of Myrtaceae and Eucalyptus. Evergreen tall trees, about 600 species. Evergreen plants have periodic dead leaves falling off within one year, most of which are tall trees, a few are small trees and a few are shrubs. The crown shapes are steeple, multi-branch and vertical branch. Leaves simple, entire, leathery, sometimes covered with a thin layer of wax. Leaves can be divided into three categories: young leaves, middle leaves and mature leaves. The leaves of most varieties are opposite, small, heart-shaped or broadly lanceolate.

Evergreen trees, with medium and fast growth rate, sunken and erect trunk and bright branches and leaves; The height of the tree can reach 25 meters, the crown is round, and the bark is reddish brown. In summer, the trunk bark is easy to crack and peel off, smooth and slightly soft, and the new bark is nearly white and the twigs are green. Leaves frost blue, covered with white powder, entire, opposite; The young leaves are round or oval, which are very unique, shorter than the black petiole, almost close to the stem, narrower and longer, nearly lanceolate and blue-gray. Due to seasonal changes, the leaves show different color changes with different amounts of white powder, which has strong seasonality. At the end of spring and the beginning of summer, the ivory Kobanawa commercial fruit blooms, which is very small and concentrated in a drop-shaped goblet-shaped capsule shell. The whole tree is beautiful and dignified, elegant and noble.

Eucalyptus' freezing point' belongs to aromatic plants or spice plants. Its leaves contain branched oil, which can be extracted and used in cosmetics, food, industry and other fields. The volatile smell emitted by the leaves also has the functions of refreshing the mind, relieving summer heat and cooling down, especially after the summer rain, the smell it emits makes people feel that it is a special enjoyment. At the same time, it has the function of repelling mosquitoes. For example, planting some eucalyptus' freezing point' in the garden of villa community will reduce mosquitoes.