1. Plants of the Oleaceae family are mainly divided into five genera, namely Fraxinus, Ligustrum lucidum, Forsythia, Jasminum, and Trichosanthes. Among them, plants represented by the genus Fraxinus include ash trees and ash trees; plants represented by the genus Forsythia include fuchsia; and plants represented by the genus Jasminum include winter jasmine.

2. This department contains many important medicinal plants, spice plants, oil plants and economic tree species. The fruit of Forsythia suspensa is one of the main components of the Chinese patent medicine Yinqiao Jiedu Pills; the fruit of Ligustrum lucidum is called Ligustrum lucidum, which is a commonly used yin-tonifying medicine; the bark of several plants of the genus is called Qinpi in medicine and is widely used in anti-inflammatory and anti-inflammatory drugs. Heat, it has the effects of clearing away heat, stopping dysentery, and improving eyesight. Mignonette (osmanthus), jasmine and various plants of the genus Clove are not only raw materials for extracting essence and preparing high-grade spices, but also important ornamental tree species.