What kinds of garden trees are there (Catalogue of Common Trees for Landscaping)

1 camphor tree Lauraceae

(1) Morphological characteristics: evergreen trees, spherical crowns, alternate leaves, three veins, spiced, spherical berries, 1 1 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. Long life, poor air resistance, urban greening and environmental protection tree species.

(2) Growth habit: 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. Seeds for breeding should be sown with harvest. Pests and diseases include powdery mildew, black spot, camphor sawfly, camphor leaf roller moth, camphor moth, camphor beetle and so on.

Oleaceae of Ligustrum lucidum

(1) Morphological characteristics: plant height 10m, and 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. In summer, Ligustrum lucidum is covered with white flowers, and the shade is like a cover. It is evergreen all the year round, green and lovely. 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.

(2) Growth habit: It is native to China, distributed in the Yangtze River basin and southern provinces, and also cultivated in North China and Northwest China. Evergreen trees like sunshine and are tolerant to 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. Sow and propagate, sow the seeds immediately after harvest, with high germination rate, or sow in the sand and the next spring. Cutting is easy to survive. Developed root system, strong tiller germination, and resistance to pruning and shaping.

3 Magnolia grandiflora Magnoliaceae

(1) Morphological characteristics: evergreen trees, up to 30 meters high, with oval cone crown. 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. Garden trees and roadside trees Magnolia grandiflora are magnificent, with thick and bright leaves and large and fragrant flowers. It is an important ornamental tree species for urban greening and is suitable for planting in parks or wider courtyards.

(2) Growth habit: Tree species 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. Magnolia grandiflora can be propagated by sowing, layering and grafting, with grafting as the main method. Magnolia grandiflora seedlings propagated by grafting 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.

Cedrupaceae

(1) Morphological characteristics: the height of the tree is more than 70 meters, and the DBH is 3-4 meters. Its trunk is straight, its material is solid, it is not easy to crack, its fragrance is lasting, and it is magnificent and green. It is one of the three famous precious ornamental trees in the world, and it is also a precious timber tree. Cedar is an elegant ornamental tree, with its flat side skills, pagoda crown, majestic posture and evergreen seasons. Cedar is very popular because of its tall and straight shape, which is suitable for planting all over the country, courtyard greening, garden construction and road greening.

(2) Growth habit: Cedar is native to India, Afghanistan and the western Himalayas, and it is distributed at an altitude of 1, 200-3000m, and its optimum living condition is 1, 800-2,600m. 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. Propagation mainly includes sowing, cutting, layering and grafting. Cutting and sowing methods are mainly used. 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.

5 Podocarpaceae

(1) Morphological characteristics: evergreen trees, up to 20m, DBH 60cm. The bark is gray, shallow-split, and falls off in thin scales. Branches are short and obliquely dense. 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.

(2) Growth habit: It 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 the north, and the culture soil can be matched with sand and humus soil in equal amount. It can be propagated by sowing and cutting. Variegated varieties can be propagated by cutting.

Six species of juniper in Juniperaceae.

(1) Morphological characteristics: 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. The side branches of cypress are twisted and kept dry, which is unique and has high ornamental value. It is widely planted 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 can absorb a variety of harmful gases and has the function of dust removal.

(2) Growth habit: Sabina vulgaris can bear seeds, but it is not easy to germinate, and 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, drought and wind prevention, and maintaining a certain humidity, rainwater intrusion should be prevented for the next half month.