Plant Name Cinnamomum camphora, Lauraceae, alias Cinnamomum camphora (Hangzhou), Cinnamomum camphora (Sichuan) and Cinnamomum camphora (Hunan). The origin and habits of tree species are distributed in Zhejiang, Fujian, Jiangxi, Taiwan Province, Hubei, Hunan, Guangdong, Yunnan and other places. Like light, deep roots, wind resistance, smoke resistance, slightly cold resistance, suitable for slightly acidic soil. Morphological characteristics: evergreen trees, spherical crowns, alternate leaves, three veins, two spices, spherical berries, 1 1 month mature, purple-black. The flowering period is April-May, the fruit period is 8-165438+1October, and the height of the tree can reach 30 meters. Seeds for breeding and cultivation should be harvested with the seeds. Pests and diseases include powdery mildew, black spot, camphor sawfly, camphor leaf roller moth, camphor moth, camphor beetle and so on. Long service life, bad gas resistance, urban greening and environmental protection tree species.

Plant name [Ligustrum lucidum] Classification: [Oleaceae] Alias true wood, wax tree and general tree originated in China, distributed in the Yangtze River basin and southern provinces, and also cultivated in North China and Northwest China. This is an evergreen tree. I like sunshine, but I can also tolerate semi-shade. Favorable slightly acidic soil, neutral and slightly alkaline soil can also adapt, while barren and arid soil grows slowly. Flowers bloom in June. Morphological characteristics: plant height 10m, smooth gray bark. The leaves are opposite, leathery, ovoid or ovoid-elliptic, entire, with dark green shiny surface and light green back. Panicle is terminal, with dense small flowers and fragrant white. Berry drupe, blue-black with white,11-65438+February fruit. Propagation and cultivation sowing method, sowing seeds immediately after harvest, with high germination rate, can also be sown in sand and the following spring. Cutting is easy to survive. Developed root system, strong tiller germination, and resistance to pruning and shaping. The application of Ligustrum lucidum in summer is like a tree full of white flowers, with thick shade like a cover, evergreen all the year round and lovely green. Suitable for hedgerow and green wall planting, it can also be used as the first tree species, which has anti-pollution ability and is a good tree species for factory greening.

Plant name Magnolia grandiflora, Magnoliaceae, alias Magnolia grandiflora, Magnolia grandiflora. Tree species of origin and habits are distributed in Beijing, Tianjin, Shanghai, Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, Shandong, Taiwan Province, Henan, Guangdong and Guangxi. Magnolia grandiflora likes warm and humid climate and needs deep, fertile and well-drained acidic soil. Like sunshine, but young trees are quite resistant to shade, not to strong light or western sun, otherwise it is easy to cause trunk burns. Strong resistance to smoke and toxic gases. Less pests and diseases, moderate growth rate. After 3 years, the growth will gradually accelerate, and it can grow more than 0.5 meters per year. Morphological characteristics of evergreen trees, up to 30 meters high, the crown of an oval cone. Branchlets and buds are rusty. The leaves are leathery, rectangular,10-20cm long, shiny on the surface, rusty on the back and slightly curled at the edge. The flowers are white with a diameter of 20-30 cm. Flowers are usually 6 petals, sometimes 9 petals. Flowers are as big as lotus, so they are also called lotus magnolia, which is full of fragrance. Flowering period may-July. The seed coat is red, and the fruit ripens in September-65438+1October. The propagation and cultivation of Magnolia grandiflora can be carried out by sowing, layering and grafting, with grafting as the main method. Grafted Magnolia grandiflora seedlings grow fast and bloom early, which is very popular. Rootstock seedlings used for grafting Magnolia grandiflora mainly include Magnolia grandiflora, Magnolia grandiflora, Magnolia officinalis and so on. Take the thick and full branches of Magnolia grandiflora the year before or the year before as the scion. After grafting, the wound of Magnolia grandiflora will heal in about 20-25 days, and then sprout and grow. After germination, when 2-3 leaves grow, pay attention to weeding in time, remove the mother seedlings and be careful not to collide with the scion. Weed, fertilize and water regularly in the future. Application of Garden Trees and Street Trees Magnolia grandiflora is an important ornamental tree species for urban greening with its majestic posture, thick and bright leaves and fragrant flowers. Suitable for planting ornamental green trees in parks or wider courtyards.

Plant name Cedar Pinaceae is also known as Himalayan Cedar, Himalayan Cedar, and its origin and habits. Cedar is native to India, Afghanistan and western Himalayas, distributed at an altitude of1200-3000m, and its optimum living condition is1800-2600m. Cedar can adapt to a wide range of climate, and can grow from subtropical zone to the south of cold zone. It grows well in the area with annual rainfall of 600- 1000 mm and the middle and lower reaches of the Yangtze River. Cedar has strong cold tolerance, but it does not adapt to hot and humid climate and often grows poorly. Cedar is a positive tree species, which can bear some shade when it is young, while big trees need enough light, otherwise they will grow poorly or wither. Cedar likes deep, fertile and well-drained soil, and can also adapt to barren and gravel land, but it is afraid that water, low-lying stagnant water or places with too high and impermeable groundwater level will lead to poor growth and even death. Cedar has weak wind resistance and smoke damage resistance, and is sensitive to harmful gas of sulfur dioxide. In the unfolding period of young leaves, such as when the air humidity is high, young leaves are vulnerable to sulfur dioxide. After being killed, young leaves quickly wither and even the whole plant dies. Morphological characteristics The tree is over 70 meters high and 3-4 meters in diameter at breast height. The stem shape is tall and straight, the material is solid, it is not easy to crack, the fragrance is lasting, and it is magnificent and green. Along with Aralia elata and Japanese golden pine, they are three world-famous precious ornamental trees, and they are also precious timber trees. Cedar is one of the elegant ornamental trees because of its flat technology, majestic posture and evergreen seasons. Propagation and cultivation mainly include sowing, cutting, layering and grafting. The main methods used are cutting and sowing. Cedar seedlings propagated by sowing method have symmetrical branches, strong germination, good tree shape and strong stress resistance, and are cutting mother trees for cutting propagation. The application of Cedar is very popular because of its tall and straight shape, which is suitable for national planting, courtyard greening, garden construction and road greening.

Plant name Pinus parviflora belongs to Pinaceae. Native to Japan, it is a temperate tree species, which likes sunshine, bears shade and avoids damp heat. It is suitable for growing in loose, fertile and slightly acidic sandy yellow soil with obvious temperature difference between day and night and good drainage and ventilation. Pine with five needles grows slowly, has a long life, germinates once a year, is not dry, and its branches are sparse and dense. Five-needle pine, also known as five-needle pine, is a precious tree species in the garden, which is decorated with key configurations. It is best to use rockery as a landscape, or peony or azalea, or plum as a companion and red maple as a companion.

Plant name Podocarpus is produced in Jiangsu, Zhejiang, Fujian, Anhui, Jiangxi, Hunan, Sichuan, Yunnan, Guizhou, Guangxi, Guangdong and other provinces, and is cultivated in all provinces south of the Yangtze River. It is also distributed in Japan. It is a semi-shade-tolerant tree; The cold tolerance is weak, so it can only be potted in North China, and the culture soil can be mixed with sand and humus soil in equal amount. Morphological characteristics of evergreen trees, up to 20m, DBH 60cm；; ; Full crown egg worker; The bark is gray, shallow-split, and falls off in thin scales. Branches are short and obliquely dense. It can be propagated and cultivated by sowing and cutting. Variegated varieties can be propagated by cutting. The tree shape is beautiful, so it should be planted as a shade tree alone, opposite or scattered in front of the hall. Podocarpus is resistant to pruning and coastal environment, and is especially suitable for landscaping and greening of windbreaks and hedges. Podocarpus brevifolia is very beautiful because of its dense leaves and branchlets. It is used as a potted plant or a general hedge. It is also reported that deer does not eat its leaves, so it is suitable for the greening of the zoo. Dwarf and variegated varieties are excellent materials for landscaping and bonsai.

Plant name Longbai Longbai is the origin and habit of Cupressaceae. The morphological characteristics from southern North China to central China are cultivated varieties of Sabina vulgaris. Evergreen tree, 8 meters high, with straight trunk, narrow cylindrical shape and twisted branchlets, hence the name. Branchlets are dense, leaves are dense, all scales, young leaves are yellow-green, and old leaves are emerald green. The cones are blue-green, and the fruit surface is slightly white. Although the propagation and cultivation of cypress can bear seeds, it is not easy to germinate. The propagation methods are mostly cutting and grafting. The grafting propagation of Sabina vulgaris is suitable for mid-February to early March in spring and late September to early June in autumn. After grafting, it is slow from the beginning of healing to survival, and it begins to heal in May after grafting in spring, so it is necessary to gradually cut off the branches and leaves of the rootstock. After that, in addition to proper shading, preventing drought and strong wind from blowing, maintaining a certain humidity, rain water should be prevented from invading in the next half month. It is made by twisting the lateral branches of cypress, with unique style and high ornamental value, and is widely cultivated all over China. 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.

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