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Sequoia is a genus of Gymnosperms in the family Taxodiaceae. Now there is only one of the largest evergreen trees in the world, which is distributed on the narrow coast of northern California and southwestern Oregon in the United States, with a height of up to 110 meters and a diameter at breast height of up to 8 meters. Leaf bitype:
The squamous leaves spirally on the main branches; The striped leaves are born on lateral branches, the base is extended, there is no petiole, and the leaves are arranged in two columns, not asymbiotic. The epidermal cells are rectangular, the cell wall is straight, the stomata are born on both sides or under the stomata, the arrangement direction of the stomata is consistent with the long axis of the leaf, and there are 4 6 paraguard cells. It first appeared in the Jurassic and is widely found in East Asia, North America and Europe in the Late Mesozoic and Paleogene and Neogene strata.
China is produced in Heilongjiang, Jilin, Liaoning, Inner Mongolia, Xinjiang, Guizhou and Shandong. Recently, it has also been reported in the Miocene strata of Luhe, Yunnan.
Sequoia is one of the most ancient and valuable trees in some of the Americas. The leaves of the redwoods are elongated, pinnate and alternately arranged, verdant and evergreen. There are some native redwoods on the north coast of California, USA, the age of the trees is about 2000 to 3000 years, the height of the tree is about 80 meters, the chest circumference is more than 20 meters, the tallest sequoia is about 104 meters high, the diameter is more than 6 meters, so it is called "the long-leaf world".
In that narrow strip of more than 400 miles, it is these "kings of the forest" that make up the redwood parks, known as the "Sequoia Empire". The redwoods have a lifespan of more than 3,000 years, such as the "General Gutland" redwood, which is 3,500 years old, with a height of meters and a chest circumference, and its volume is enough to build 50 six-room houses. Another example is the 2,400-year-old redwood, which is 96 meters tall and has a chest circumference of more than 20 meters.
Because it blocked the way of the road, people devised a plan to get the best of both worlds: a "disembowelment" was made, and a tunnel was opened at the base of the tree trunk, so that the car could pass through the heart in the tree hole, and the river would flow endlessly. Today, the giant sequoia tree is still alive and well, and it has become a famous road sign in the history of highways.
Sequoia trees have thick bark and are highly resistant to pests and diseases, as well as fireproof, making them thriving and vigorous. Even if the heart of the tree decays, the outer layer of the trunk remains intact. Locals call this hollow tree a goose pen because the early inhabitants raised geese here.
The trunk of the sequoia tree is straight and complete, the wood texture is beautiful, it is resistant to decay and fire, it is fragrant, it is not eaten by termites, and it is a valuable high-grade building and blockery; The bark contains tannins; Roots, leaves, bark, wood, cones, and cedar knots can all be used as medicine.
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The value of the sequoia tree lies mainly in the bark of the sequoia tree, which is an effective anti-cancer substance. In addition, the redwood tree is also a relatively old and scarce tree species, which can only be found in a few remote mountains in China. Because its rare medicinal value has been greatly destroyed, ** is also increasing efforts to protect it.
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Sequoia trees grow rapidly, have a high survival rate, and have thick bark, which has a strong ability to avoid pests and prevent fire. So it is recognized as one of the most valuable tree species in the world.
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The fruit is so large that the seeds inside can be eaten when pat down, and the local custom is to give it to newlyweds, while the huge fruit can be used as an ornament. It's beautiful.
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Sequoia bark can be used to extract paclitaxel to fight cancer.
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1. The idea of economic value being ruined:
The trunk of the sequoia tree is straight and round, the wood texture is beautiful, it is resistant to decay and fire, it is fragrant, it is not eaten by termites, and it is a valuable high-grade building and blockery; The bark contains tannins; Roots, leaves, bark, wood, cones, and cedar knots can all be used as medicine.
2. Diplomatic gifts:
In 1972, when Nixon, the former American **, visited China, he gave several California redwood saplings to the Chinese side as gifts. Since then, the California redwood tree has been successfully introduced in some provinces and cities in China, becoming a symbol of friendship between China and the United States.
3. Medicinal value:
According to the Chronicles of Sichuan Traditional Chinese Medicine, sequoia bark can stop dysentery; Qi, has the effect of dysentery, prolapse, qi stagnation and abdominal distention.
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Sequoia tree belongs to the pine family, larch plant, also known as larch, Larch birch, is a deciduous tree, more like light, cold-resistant, and adaptability is relatively strong, generally will grow in the higher altitude area, is one of the excellent native tree species, can also be used for garden ornamentation.
Sequoia trees belong to the pine family, larch plants, also known as larch cherry, larch larch, is a deciduous tree, more like light, cold-resistant, and adaptability is relatively strong, generally grows in the area of relatively high altitude, is one of the excellent native tree species, can also be used for garden ornamentation.
Where redwood trees grow.
The economic value of the redwood tree is relatively high, and it is generally used for afforestation, and can also be used for construction, electric poles, bridges, appliances, furniture and wood fiber industrial raw materials.
Sequoia trees are mainly distributed in China's Sichuan Minjiang River Basin, southern Gansu grows more, usually grows on mountain slopes, imitation silver bush its growth rate is relatively fast, because its adaptability to the climate and environment is extremely strong, as long as there is sufficient sunlight, it can grow relatively robust.
What does a redwood tree look like.
The redwood tree is a tree that grows up to about 50 meters in height, has a diameter at breast height of one meter, has gray or grayish-brown bark, is rough, the branches are usually flattened, the crown is conical, the twigs are usually drooping, the young branches are hairy, and then they fall off, and the bulbs usually grow at the tips of short branches.
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Sequoia trees have no medicinal value, and redwood trees are an ornamental fir tree. Sequoia (Larix Potaninii Batal), a pine tree species, also known as larch of P. bourcipinii, deciduous tree, light-loving, cold-resistant, adaptable, generally suitable for 2400 3900m above sea level, mainly distributed in the Minjiang River basin of Sichuan, China, is one of the excellent native tree species. It grows rapidly in the slope area with cool climate, deep soil, fertile and well-drained, and the branches of the year are soft and drooping, and can also be used as an ornamental tree species in the garden.
The main value of the redwood tree is its high survival rate, thick bark, and strong insect pest protection and fire prevention ability. So it is recognized as one of the most valuable tree species in the world.