Do you have any information about oak trees?

Quercus species of FAGACEAE.

Deciduous or evergreen trees, some shrubs. The leaf margin is serrated, and the whole leaves are few. The catkin of the male flower droops, and the female flower is solitary in the involucre. The nut is solitary, the inner wall of the pericarp is hairless, and the undeveloped ovule is located outside the base of the seed. Distributed in Asia, Europe, Africa and America, it is rich in resources, with about 300 species. There are more than 60 kinds of oak trees in China. Heilongjiang, Liaoning, Jilin, Inner Mongolia, Shandong, Henan, Guizhou, Guangxi, Anhui, Shaanxi, Sichuan and other provinces are the majority. Vertical distribution, flat land to 3000 meters above sea level can grow. In central Sichuan, mountains can grow to an altitude of 4600 meters. Its leaves are the main feed for tussah. Wood is a strong and corrosion-resistant material, and bark, leaves, shells and extracts are necessary materials for tanning, printing and dyeing and fishing. Cork has a thick cortex and can be used as industrial cork material.

Oak belongs to angiosperms, dicotyledonous plants, FAGACEAE (mainly characterized by hard fruits growing in bowl-shaped hard shells) and Quercus. Oak, also known as oak and oak, belongs to deciduous broad-leaved trees. Generally, the trunk is black, and some of it is curved and inclined to the downwind direction, which is rough. Its fruit is acorn, the nut is solitary, the inner wall of the pericarp is hairless, and the undeveloped ovule is located outside the base of the seed. However, the leaves have serrated edges, the catkin of male flowers droops, and the female flowers are solitary in the involucre. The leaves will turn reddish brown before they fall in autumn, which is very beautiful from a distance.

/GB/Dalian daily/2006-03/24/content _ 1202685 . htm