2. Cinnamomum camphora: Cinnamomum camphora is an evergreen tree of Cinnamomum camphora of Lauraceae, with a height of 30m and a diameter of 3m, and a broad oval crown; Broad crown, dense branches and leaves, magnificent, is an excellent green tree, street tree and courtyard shade tree. Produced in southern and southwestern provinces of China. Vietnam, Korea and Japan are also distributed, and other countries often introduce and cultivate them. All plants have the aroma of camphor, which can be used to extract camphor and camphor oil. Wood is hard and beautiful, suitable for making furniture and boxes. Cinnamomum camphora is resistant to chlorine, sulfur dioxide, ozone, fluorine and other harmful gases, which can repel mosquitoes and flies and resist short-term flooding. It is the main raw material for producing camphor. Excellent material, which is a good material for making furniture.
3. Pine: Pine is the general name of Pinaceae, which is firm and has a long life. In Chinese, many kinds of pine trees are called "Chinese fir", but in some places where the climate is not so hot, about 40 degrees to 60 degrees north latitude (such as Europe), this type of plants is also more common. Pine trees are generally characterized by needle-like leaves (to prevent a large amount of water from being evaporated), flat linear or needle-like leaves, alternate spirals, or clustered on short branches; Often monoecious; Stamens, seed scales and ovules of cones are also spirally alternate; The stamen of male cone has two anthers, the seed scale of female cone has two ovules, and the bract scale on the back of the seed scale is separated from the seed scale. As far as the leaf shape of pine trees is concerned, pine needles are most people's impressions of pine trees, but it should be noted that the needles of pine trees do not grow directly on the branches, but on the node pillows at the junction of branches and leaves.
4. Cycas. Cycas Cycas Cycas, Cycas, alias: Bihuo banana, phoenix-tailed banana, phoenix-tailed pine and phoenix-tailed fern. It is named for its high density, sinking in water and heavy as iron. On the other hand, it is named because it needs a lot of iron for its growth. Also known as phoenix-tailed banana, fire-retardant banana and phoenix-tailed pine, they are mostly planted in the south and are now widely distributed in China, Japanese, Philippine, Indonesian and other countries. The most famous Cycas is flowering, which is called "Cycas flowering". Cycas is a beautiful ornamental tree species, which is widely cultivated. Its stem contains starch and can be eaten. The seeds are oily, rich in starch, slightly toxic, edible and medicinal, and have the effects of treating dysentery, relieving cough and stopping bleeding.
5. Dragon cypress: Dragon cypress is a small evergreen tree native to China and Japan. Because of its beautiful tree shape and green leaves, it is often used for beautification. Longbai is a precious garden tree with a cylindrical crown, which looks like a dragon and a fixed tower. It is suitable for planting around Gaoxia Square or for potted plants. It has adsorption function and dust removal effect on a variety of harmful gases.