1. Good water resistance,

　　2. Good salt and alkaline resistance,

　　3. The root system is relatively developed.

　　Willow is the general name of a kind of plants: Salix matsudana Koidz., Salix chaenomeloides Kimura, Salix babylonica Linn. Salix is mostly a shrub, a rare tree, with no terminal buds, sympodial branches, few stamens and insect-borne flowers. The characteristics show that Populus and Salix have evolved.

　　1. Leaves are slender and soft: willow leaves are slender and strip-shaped, with high softness, as soft as catkins.

　　2. The leaves are barbed: the leaves of willow trees have obvious inverted hook structure, which is an adaptive way for willow trees to resist wind.

　　3. Soft and drooping branches: The crown of willow is usually oval or oval, and the branches are soft and drooping, forming a landscape covering the whole crown.

　　4. Have a graceful posture: Many people like the graceful posture of willow, because the crown and branch shape of willow can show many dynamic aesthetic feelings.

　　5. Rapid growth and great vitality: Willow grows very fast and full of vitality, so it is widely planted in street trees, gardens and parks in many cities.

　　Willow has the following characteristics: high flexibility, rapid growth and strong adaptability. The trunk and branches of willow are flexible and not easy to break, which makes them widely used in coastal protection, water conservancy, greening and other fields. Willow grows rapidly with well-developed underground roots, which can quickly absorb soil moisture and nutrition, and has strong adaptability and can survive in different environments. Willow branches usually hang down, which is different from other trees' growth habits, so it has special ornamental value. At the same time, willow pollen is also a common allergen.

　　Good salt and alkaline tolerance, relatively developed root system 1. The appearance of willow is characterized by lush foliage, vitality, simplicity, luxury, strong adaptability, light-loving, wet-loving, cold-resistant, strong reproductive ability and extremely rapid growth. Every spring, willows are the first to sprout and turn green, and the light green of willow buds symbolizes life and vitality. Willow can withstand deep water flooding and will not die even in short-term flooding. When willow is flooded, new roots will soon grow on its branches, forming a huge root group. Suspended water can help or replace the original.

　　It's flexibility. Willow grows in a humid environment, so its branches are soft and flexible, which adapts to the wind and rain. Moreover, willow leaves are also very soft, with only a thin epidermis and no hard tissue support. Therefore, the willow is often used to reflect the image of tenacious vitality, and it is also a symbol of the good quality of "flexibility" in ancient China culture. Willow has many other characteristics, such as being fond of growing beside water and having certain requirements on the pH value of soil.

　　Willow is an evergreen or deciduous shrub or tree, which is common in Asia, Europe, North America and other continents. The following are some characteristics of willow:

　　1. The branches are flexible and easy to bend: The branches of willow trees are very soft, so they are easily bent into various shapes, such as making wickerwork baskets and wicker screens.

　　2. Leaves are slender and lanceolate: willow leaves are very long and narrow, with green on the top and long white hair on the bottom, which is lanceolate and generally about 3 to 10 cm long.

　　3. Early flowering and slender inflorescence: Like poplar, willow belongs to early spring flowering tree species, and its inflorescence is very slender, usually more than several centimeters long, and grows on new shoots.

　　4. Smooth bark: The bark of willow trees is smooth, and often presents gray, taupe and other colors, and sometimes there are thin longitudinal cracks.

　　5. Variety: There are many kinds of willows in the world, among which Bai Liu, Golden Willow and Haloxylon ammodendron are the most common. Each kind of willow has its own characteristics and uses.

　　Willow is a deciduous tree, its characteristics include:

　　1. Rapid growth: Willow usually grows rapidly and can reach most of its height and width within a few years, so it usually needs pruning to keep its shape.

　　2. Soft branches: Willow branches are very soft and can be easily bent and twisted, so they can be used to make various artworks and decorations.

　　3. Slender leaves: Willow leaves are slender and soft, which can be as long as tens of centimeters, so they are very suitable for decoration and making works of art.

　　4. Strong water absorption capacity: Willow has strong water absorption capacity and can survive in a dry environment.

　　5. Strong wind resistance: willow branches and leaves are very tough and can resist the attack of strong winds.

　　6. High value: Willow is an important material for wood and art, and also has high economic value.

　　It is flexible and adaptable to the environment. The trunk of willow is very flexible, and the branches sway with the wind when they hang down, but they are not easy to break. This is because the trunk and branches of willow are slender and soft, and the xylem contains flexible cellulose and hemicellulose. In the natural environment, willow is very adaptable to different climates and soil qualities, which can grow in moist soil and survive in dry land. The root system of willow is very developed, which can quickly absorb nutrients and water in the soil, so the adaptability of willow is very strong. In addition, willow is a perennial water-loving plant, and its early spring flowering can attract many moths and bees, which is beneficial to the balance of natural ecology.

　　Willow trees are shaded, which can block ultraviolet radiation and enjoy the cool. The branches of willow trees can also be made into whistles. Willow trees are divided into several types, and weeping willows are widely planted, and the fresh buds can be used as cold dishes.

　　1. The leaves of willow are mostly opposite. Its leaves are sparse, and its demand for light is high. When planting, plants should receive sufficient light. The life span of willow is very short, generally only 20 ~ 30 years. Willow is a native plant in China, and it can usually be propagated by cutting, sowing and hole planting.

　　2. Willow is the general name of a kind of plants, belonging to ecological amplitude, which has a wide adaptability to the environment, likes light, likes humidity and is cold-resistant, and it is a moderately humid tree species. However, some species are also more drought-tolerant and salt-tolerant, and can grow in places with poor ecological conditions, and grow better in plains with superior site conditions. The average life span is 20 ~ 30 years, and a few species can reach more than 100 years. The growing period is longer in a year, with early germination and late defoliation.

　　3. There are many varieties of willow. According to statistics, there are more than 500 kinds in the world. Different kinds of willows have different appearances and growing environments. In addition to weeping willows, common willow species include Salix matsudana. Salix matsudana, with broad and round crown, lanceolate leaves, 5-10 cm long, slender branches, upright or oblique spreading, strong drought resistance and developed roots, can survive in places with relatively water shortage.