1, green willow.

2. drooping willows.

3. Green willow.

Extended data

1. Willow is a native tree species in China. According to textual research, there are willows in Shanwang forest in Miocene of Tertiary. According to the sporopollen analysis in Qingdao, Shandong Province, "Salix plants existed near Jiaozhou Bay in Qingdao from1000 to 8500 years ago." Willow is also one of the earliest artificially cultivated and widely distributed plants in China, and the word "willow" has appeared in prehistoric Oracle Bone Inscriptions. Willow planting in China has a history of more than 4,000 years, which can be traced back to the ancient Shu period, and the demarcation of the tree was closed by the king of fish.

2. Willow is cold-resistant, waterlogging-resistant, drought-resistant, and likes warm to high temperature. There are about 520 species in the world and about 250 species in China, all over the country. Willow is easy to breed, simple in cultivation method, strong in vitality, can beautify the environment, and has applications in life, environmental protection, medicine, etc. It is a "four-sided" greening tree species. In terms of humanities, willow is homophonic with "willow", so the ancients often gave willow to their friends to express their farewell. Yangliu has always been loved by literati, and people have left a lot of beautiful poems.

There are many kinds of willows, which are easy to cross. Hybrid has strong growth potential and adaptability, and it is easy to reproduce asexually. You can choose from natural or artificial hybrid populations and obtain excellent clonal varieties through asexual propagation. In addition, a large number of high-quality seedlings can be obtained quickly by plant tissue culture. Breeding based on garden ornamental should focus on improving its branches, leaves and tree shape, and improving its anti-pollution ability and pruning and shaping ability.

4. Willow is one of the main tree species in North Temperate Park, with beautiful tree shape, early flowering and shady trees in early spring. Such as weeping willows and Korean weeping willows, with slender drooping branches, such as willow leaves of eyebrows. All kinds of shrubs and willows are resistant to pruning and can be cultivated into shrubs of various shapes or used as hedges. Willow is most suitable for waterside greening in garden landscape, such as "Willow Warming Warbler" in Hangzhou West Lake and "Taoxi Liuan" in Guiyang Huaxi. There are still many beautiful willows to be developed, such as those with big leaves, magnolia-like, purple branches, long spikes, red and yellow, red pistils and stigmas, which are also beautiful.

5. In addition, there are more than 20 kinds of small alpine willows, the height is only 5 ~ 30cm, the branches are prostrate or erect, twisted and deformed, with different shapes, long life and easy survival, which are good materials for making garden bonsai. Commonly used in garden viewing, residential areas, gardens, schools, factories, hillsides, courtyards, roadsides and buildings. When in full bloom, the branches extend in all directions, making the courtyard full of green with high ornamental value; It is an ideal tree species to beautify the courtyard. It has strong resistance to air pollution and dust and is suitable for growing in urban gardens, especially by pools or streams.

6. Bark contains tannin; The material is worse than willow, which can be used as utensils and paper raw materials; Catkin can fill chair cushions and pillows; Branches and fibrous roots can dispel wind and remove dampness. There is a cloud in the poem: the willow is dark and the flowers are bright. It shows that willow is extremely easy to survive. The fiber of willow bark can be used as raw material for textile and rope making; Branches can be woven into baskets, baskets, crates and helmets. Wood is white and tough. Can be used as small farm tools, small household appliances and charcoal burning.

References:

Baidu encyclopedia-willow