Buxus buxus, a dicotyledonous plant of Buxus, is 1~6m high and has oval leaves. It is a shrub or small tree, which is often used for landscaping. Buxus buxus is the most widely distributed genus in East Asia, with many varieties with excellent characters. Boxwood is suitable for planting in areas with fertile soil and soft soil. Strong resistance, can grow in weak acid and alkali soil, and has strong tolerance to extremely hot, cold or dry environment. Boxwood likes light and water and is suitable for growing in sunny and humid environment. Although it can grow and maintain its characteristics in the environment with short sunshine time and weak light, its leaves tend to grow white or weaken in this environment. Because of its strong environmental adaptability and wide distribution.

Chinese name: China boxwood. Et Wils.) Cheng, alias: Buxus buxus, Buxus buxus, Oolong Wood, Millennium Short, Evergreen World: Botany: Angiosperms: Dicotyledonous Plants: Sapindaceae: Buxus: Buxus Distribution: Yellow River Basin, Yangtze River Basin, Nomenclature and Year: Cheng 1962, Morphological Characteristics Branchlets quadrangular, opposite surfaces pubescent or glabrous, internodes 0.5-2 cm long. The leaves are leathery, broadly elliptic, broadly obovate, ovoid or oblong, most of them are1.5-3.5cm long and 0.8-2cm wide, the leaf tips are rounded or blunt, the notches are small, the base is not sharp, round or sharp or wedge-shaped, the leaves are bright, the midvein is prominent, the lower part has fine hairs, the lateral veins are obvious, and the midvein on the back of the leaves is flat or slightly prominent. Inflorescence axillary, capitate, densely flowered, inflorescence axis 3-4 mm long, hairy, bracts broadly ovate, 2-2.5 mm long, hairy on the back; Male flowers are about 10, pedicellate, outer sepals are oval, inner sepals are nearly round, 2.5-3 mm long, glabrous, stamens and anthers are 4 mm long, sterile pistil has a rod-shaped stalk, the terminal is enlarged, and the height is about 2 mm (the height is about 2/3 or several times the length of sepals); Sepals of female flowers are 3 mm long, the ovary is slightly longer than the style, hairless, the style is thick and flat, and the stigma is inverted heart-shaped, extending down to the middle of the style. Flowers bloom in March. Capsule is nearly spherical, 6-8(- 10) mm long, and persistent style is 2-3 mm long. The fruiting period is May-July. Growing environment Poplar mostly grows in high mountains, steep cliffs and mountainous and stony places. Tolerance to shade, like warm and humid climate, with many valleys, streams and forests, with an altitude of 1200-2600 meters. It is a terrestrial woody plant. It is resistant to shade and likes light, and can maintain good growth under indoor and outdoor conditions. In the long-term shading environment, although the leaves can remain green, it is easy to cause the branches to grow white or weaken. Like wet, can withstand rainy weather for about a month, but avoid long-term water accumulation. Drought tolerance, as long as the surface soil or basin soil is not completely dry, there is no abnormal performance. Heat-resistant and cold-resistant, able to withstand summer exposure and the cold of MINUS 20 degrees Celsius, but it should be ventilated when it is hot and humid in summer. The requirements for soil are not strict, and light and fertile sandy loam is better. Potted plants can also be made of vermiculite, peat or soil, which has strong alkali resistance. Strong tillering ability, pruning resistance and easy molding. The flowerpot can be changed or transplanted in four seasons. When transplanting or sprouting in summer, we should pay attention to shading to prevent the soil from getting too wet, otherwise the original leaves will fall off easily. Leaves will turn red in autumn after full illumination and dormancy. Boxwood is located in China, mostly distributed in Shaanxi, Gansu, Hubei, Sichuan, Guizhou, Yunnan, Guangxi, Guangdong, Jiangxi, Zhejiang, Anhui, Jiangsu, Shandong and other provinces, and some of them are introduced and cultivated. There are many valleys, streams and forests, with an altitude of 1200-2600 meters. The main value of medicinal value is bitter, pungent and flat. Indications: expelling wind and removing dampness, activating qi and promoting blood circulation. It can be used for rheumatic arthralgia, dysentery, stomachache, colic, abdominal distension, toothache, traumatic injury, and swelling and pain. Usage and dosage: 3 ~ 4 yuan, decocted or soaked in wine; Appropriate amount is applied externally, mashed and applied to the affected area. Garden value Buxus buxus has dense branches and leaves, bright and evergreen leaves, and is a commonly used foliage tree species. Gardens are often used as hedgerows, foundation planting, single plants after pruning and shaping, clustered plants on lawns, around buildings and roadside, and can also be decorated with rocks, and indoor potted plants can be used as bonsai. Economic value wood is light yellow, tough, delicate, moderate hardness, no brown eyes, natural yellowish color, moist and ivory effect. Wood is tough and compact, and can be used for carving and carding. Buxus microphylla, a common variety, has broad elliptic or broad elliptic leaves, 7- 10 mm long and 5-7 mm wide, dark or bright leaves and prominent lateral veins; Capsule 6-7 mm long, glabrous. Produced in Huangshan, Anhui, Longtangshan, Zhejiang, Lushan, Jiangxi, Shennongjia and Xingshan, Hubei; Born on a rock at an altitude of 1000 meters. Boxwood var. davidiana var. davidiana. Davidia involucrata, low growth, dense branches, internodes usually 3-6 mm long, thick leathery leaves, round or wide oval, sparse and wide oval, 9- 12 mm long, 8- 10 mm wide, round apex, small notch, round base, sparse and sharp, and the edge is strongly curled downwards. Produced in Ruyuan County, Guangdong Province, Yizhang County, Hunan Province and Wulaofeng, Lushan Mountain, Jiangxi Province; Born on rocks or bushes in the sun, altitude 1000- 1800 m. Euonymus humilis leaves are tiny, 5-9 mm long and 3.5-6 mm wide, and the fruit is hairless. Different from Buxus microphylla, the epidermis is extremely thick, and there are often no lateral veins and wrinkles. The capsule is spherical with a length of 4 mm and a short style. It is produced in Badong county, western Hubei province, under forests on hillsides, with an altitude of 2 100 meters. Boxwood in Sichuan. The leaves of Buxus acutissima are elliptic-lanceolate or lanceolate, 2-3.5cm long and 1- 1.3cm wide. The two ends are tapered, the tip is pointed or slightly blunt, the midvein protrudes to both sides, and the lateral veins on the surface of the leaves are numerous and obvious. After drying, the back of the leaves is smooth or slightly wrinkled. Inflorescence and flower belong to the same subspecies. Capsule is generally 3 mm long and persistent style is 3 mm long. Anhui, Zhejiang, Fujian, Jiangxi, Hunan, Hubei, Sichuan, Guangdong and Guangxi provinces; On rocks or in bushes beside raw streams, 600-2000 meters above sea level. Cultivation techniques, propagation and seedling management of boxwood cutting propagation are common methods for boxwood maturity. Seed cuttings need to be selected in the early stage of cutting and seedling raising. Generally, the cutting effect is best when the tree tissue fluid stops flowing in autumn and winter. The selected branches should meet the conditions of full lignification, health and no pests and diseases, and the cutting length is 0. 1 ~ 0. 15m. Then, the tied branches will be stored in the sand for cutting in the next year. Loose and disinfected sandy loam soil is selected for the cutting seedbed, holes are punched at equal intervals to make the branches penetrate into the soil for 2/3 or 1/2, and then the sand is pressed to contact with the branches. After cutting, water the seedbed, keep the soil humidity at 60%~80%, and keep the room temperature at 25℃. When cutting, choose to plant bare root branches for 30-40 days and work in cloudy or rainy days with high air humidity. After cutting, it is necessary to thoroughly soak the soil with water. Water according to the weather, apply urea every month, switch to phosphorus and potassium fertilizer after cutting for 9 months, and let the branches carry out photosynthesis independently to synthesize the organic matter they need. The cultivation and management of Buxus buxus has a wide range of cultivation sites and strong resistance, and can grow in a variety of soil environments, but the most suitable soil condition for Buxus buxus growth is fertile and humid soil. When boxwood is fertilized, it should be buried deep in the planting hole after it is fully mature. The planting time of Buxus buxus should be chosen before the leaves germinate in spring or after the metabolic activity of trees slows down in autumn. When planting, the planting spacing should be planned reasonably to ensure that each seedling has enough growth space and nutrients. Buxus buxus needs more irrigation when it grows, and it is necessary to ensure that the cultivation environment is in a suitable water content range when it is cultivated. At the seedling stage, after the cultivation, the branches should be watered 1 time, so that the branches can take root stably, and the second watering every 1 week, and the third watering will take another half a month. After these three times of watering, suitable irrigation can be carried out according to the weather, but the irrigation amount should be determined according to the rooting amount of seedlings. Ensure that the root system of seedlings is always under the soil, and avoid the phenomenon of root system * * * and seedling lodging. It should be noted that in the late stage of seedling growth, it is necessary to reduce the number of irrigation and accelerate the lignification of seedlings. In summer, it is necessary to prevent water from evaporating too fast, and choose to irrigate when the sun is weak in the morning and evening. Pest control In the environment with too small planting spacing, it is difficult to effectively control the pests and diseases of Buxus buxus, so it is necessary to plan the planting spacing reasonably before planting to ensure a good growth environment for Buxus buxus. When common pests and diseases such as aphids and snails occur in boxwood, conventional pesticides are sprayed for control. Boxwood often suffers from powdery mildew and brown spot, which often appears on the surface of boxwood leaves. In the planting environment, the direct sunlight time is less, or the planting spacing is too small, the ventilation between trees is poor, and pests often occur. The main measures to control powdery mildew and brown spot are to plant Buxus buxus seedlings reasonably, treat diseased leaves and tree tops in time, and reduce excessive contact between trees and germs. Or spraying 25% triadimefon wettable powder 1500~2000 times for chemical control.