What is the latest information about cedar?

Cedar is an evergreen tree of the genus cedar of the pine family, also known as cedar, pagoda pine, cypress, Himalayan cedar, etc., produced in western Asia, western Himalayas and Africa, and along the Mediterranean coast. There is only one kind of Himalayan cedar in China, which is distributed in the south of Xizang and India and Afghanistan. It has been widely cultivated as garden trees in Beijing, Lushun, Dalian, Qingdao, Xuzhou, Shanghai, Nanjing, Hangzhou, Nanping, Lushan, Wuhan, Changsha, Kunming and other places.

The cedar is about 30 meters high and has a breast diameter of 3 meters. Bark dark gray, split into irregular scales. Branches spreading, slightly oblique or slightly drooping, branchlets often drooping, one-year-old branches grayish yellow, two-or three-year-old branches are gray, light brownish gray or dark gray. The leaves are radially extended on the long branches, and the leaves of the short branches are in clusters, needle-shaped, hard, light green or dark green. The male cones are long-ovoid or elliptic-ovoid, while the female ones are ovoid. The cone is light green before ripening, slightly powdered, reddish brown when ripe, ovoid or broadly oval. The seeds are subtriangular, the wings are broad and longer than the seeds.

Cedar thrives on acid soil with mild and cool climate, deep soil layer and good drainage, which requires mild and cool climate and deep and well-drained soil in the upper layer, like plenty of sunshine, shade tolerance, acid soil and micro-alkali, 1300-3300 meters above sea level, north warm temperate deciduous broad-leaved forest, southern warm deciduous broad-leaved forest, mid-subtropical evergreen, deciduous broad-leaved forest and evergreen broad-leaved mixed forest. The warm temperate zone with annual precipitation of 600 to 1000 milliliters to the subtropical climate grows best in the middle and lower reaches of the Yangtze River in China.

Cedar is one of the world-famous garden ornamental tree species, which has strong dust control, noise reduction and germicidal ability, and is also suitable for greening tree species in industrial and mining enterprises. The tree is tall and graceful, so it is most suitable to be planted alone in the center of the lawn, the center of the vestibule, the center of the square or both sides of the main building and the entrance of the garden gate. The branches of the lower part of the trunk spread flat from near the ground, do not wither all the year round, and can form luxuriant and magnificent crowns. In addition, they are planted on both sides of the garden road to form corridors, which are also very spectacular.

The medicinal use of cedar has a long history, dating back to biblical times. The ancient Egyptians added cedar oil to cosmetics for beauty and as an insect repellent. Natives in the United States also use cedar as a sacred product for medicine and purification rituals. Aromatic oil can also be obtained by distillation. The various benefits of cedar essential oil make it an excellent choice for the treatment of dandruff and rash. It has medical effects such as anti-fat leakage, antisepsis, sterilization, deficiency, convergence, diuresis, menstruation, expectorant, insecticidal and sedative.