2. Cinnamomum camphora is an evergreen tree of Lauraceae and Cinnamomum, with a height of 30m and a diameter of 3m, and a broad oval crown. With a wide crown, dense branches and leaves and magnificent momentum, it is an excellent greening 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 camphor aroma, which can be used to extract camphor and camphor oil. Wood is hard and beautiful, so it is suitable for furniture and boxes. Cinnamomum camphora is resistant to harmful gases such as chlorine, sulfur dioxide, ozone and fluorine gas, which can repel mosquitoes and flies and resist short-term flooding. It is the main raw material for camphor production. Excellent material, which is a good material for making furniture.
1. Ginkgo biloba is a deciduous tree of Ginkgo biloba. Ginkgo biloba is a deciduous tree with a diameter at breast height of 4 meters. The bark of young trees is nearly smooth and light gray, and the skin of big trees is grayish brown, irregularly longitudinal and rough. There are long branches and slow-growing short branches. The crown of young and mature trees is conical, while that of old trees is broadly oval. Branches are nearly whorled and extend obliquely. Leaves alternate, scattered radially on long branches, with slender petioles, fan-shaped, light green on both sides and hairless. Scattered on long branches and clustered on short branches. Its vein form is "bifurcation vein".
The fruit of ginkgo tree is commonly known as ginkgo, so ginkgo is also known as ginkgo tree. Ginkgo tree grows slowly, and its life span is extremely long. Under natural conditions, it takes more than 20 years from planting to bearing ginkgo fruit, and it will bear a large number of fruits after 40 years. Therefore, some people call it "Gongsun Tree", which means "the public can eat the sun". It is the longevity star in the tree and has ornamental, economic and medicinal values.
3. Taxus chinensis is the general name of the genus Taxus. This genus is about 1 1 species, distributed in the northern hemisphere. There are 4 species 1 varieties in China.
Taxus chinensis belongs to shallow-rooted plants, whose main roots are not obvious and lateral roots are developed. It is recognized as a rare natural anti-cancer plant on the verge of extinction in the world. It is an ancient tree species left over from Quaternary glaciers and has a history of 2.5 million years on the earth. Due to the slow growth rate and poor regeneration ability of Taxus chinensis under natural conditions, a large-scale raw material forest base of Taxus chinensis has not been formed in the world for a long time.
4. Aquilaria sinensis, namely Aquilaria sinensis and Aquilaria sinensis, is a tropical and subtropical evergreen tree, a rare precious medicinal plant in the world, a national second-class protected plant, and also a tree protected by Appendix II of CITES Convention. The height is 5- 18 meters, the bark is dark gray, almost smooth, and the fiber is tough; Branchlets cylindrical, rugose, sparsely pilose when young.
5. Podocarpus, alias Taxodium, Podocarpaceae, Podocarpus is an evergreen coniferous tree with a height of 20m and a DBH of 60cm；; Bark gray or grayish brown, shallow longitudinal crack, flake off; Branches spread or spread obliquely, dense. Leaves are spirally inserted, strip-lanceolate, slightly curved. Male bulbs are spicate and axillary, with several triangular bracts at the base; Female cones are solitary in leaf axils, pedunculate and with a few bracts at the base. The seed is ovoid, the apex is round, the fleshy aril is purple-black when ripe, with white powder, and the receptacle is cylindrical, red or purplish red. The flowering period is from April to May, and the seeds mature from August to September.
Podocarpus is distributed in many provinces and regions of China and also in Japan. The material is meticulous and uniform, easy to process, and can be used as furniture, utensils, stationery and farm tools.
Www.miaoyewang.com/know/show-158.html: the name and variety of the most precious seedlings in China.