As the city attaches more and more importance to greening, there are more and more green landscape trees in the city, and for the empty space in the corners of the past, there are now a lot of green plants everywhere.
Green plants can not only change our living environment in normal times, but when it comes to the flowering season, bright flowers can make us feel happy, and there is such a plant, which can be seen everywhere in the city.
Oleander is almost very common in southern cities, and with the development of urban greening, many northern cities have gradually appeared in it.
Not only does this plant grow beautifully, but it also has a very poisonous color, but it is also highly toxic in its pollen.
10 leaves can make people die of poisoning, why such a highly poisonous plant, why will it become a green plant in the city, can be seen everywhere.
Toxicity of oleander
Beneath the beautiful appearance, but there are deadly toxins, oleander although the flowers are beautiful, but it is highly toxic all over the body.
Oleander is very toxic, and it is rich in many types of toxins, it can be said that each part of oleander has different toxins, and the most toxic of them is the juice and leaves of oleander.
These toxins are deadly, and the toxicity of a single leaf alone can cause a toxic reaction in a baby, and it can even be fatal.
For adults, the toxicity of 10 to 20 leaves can pose a threat of death, which shows how toxic oleander leaves are.
The juice that flows out of oleander when it is broken, once the human skin is in contact, will also produce different degrees of itching, and if it is not treated for a long time, it will even cause skin ulcers.
However, this is not the most terrible, even after the branches of oleander are dried up, since such dead branches are still poisonous, and for such dead branches to be burned, the burning smoke will become poisonous smoke.
After contacting the toxicity of oleander, the most common symptoms are nausea and vomiting, abdominal pain and diarrhea, and with the increase of toxicity, dizziness and headache will occur, and even arrhythmia in severe cases, and even fatal poisoning in severe cases.
The main thing that can cause this poisoning reaction is the cardiac glycosides in oleander, which will combine with some substances in the human body after entering the human body, resulting in toxicity, which is the reason for poisoning after accidental ingestion.
Although this poison generally occurs after ingestion, whether it is ingested by mistake on the fruit or leaves, these poisons are not as toxic as in oleander juice.
The juice can be said to be the most poisonous part of the whole oleander plant, that is, the milky white liquid that overflows from the fracture when the oleander is broken, which contains a variety of different cardiac glycosides, if accidentally contaminated, it will lead to poisoning.
Once exposed, it can cause allergic skin disease, and depending on the amount of exposure, different physical effects will occur. Such a poisonous plant, how does it spread all over our cities?
The origin of oleander
Such a beautiful and dangerous plant is not our native Chinese plant species, it is actually native to subtropical regions, and it was first discovered in India and Iran.
Because the shape of its leaves resembles bamboo leaves, and because its flowers resemble the shape of peach blossoms, it is named "false bamboo peach", which is an evergreen shrub in all seasons.
Later, with the simplification of the name and the different names, some places called "willow leaf peach" and "oleander", etc., and then their names were simplified, and finally called oleander.
Because of the rapid growth cycle, it can grow to a height of two or three meters and be fully formed in two or three years, and because it can bloom gorgeous and dazzling flowers, it is deeply loved by people.
The colors of oleander flowers are varied, including red, white, yellow, and purple, and when they bloom, they are also very popular.
Around the time of the Tang and Song dynasties, with the development of trade, this beautiful plant was discovered in our country, and then it was introduced from India to China, and from this time, oleander became a widely cultivated ornamental plant in our country.
Because oleander is native to the subtropical region, it also has a very suitable growing environment in the south of our country. It began to spread widely in the south.
However, this plant has been found to contain highly toxic in ancient times, and it is recorded in the "Compendium of Materia Medica", and the sentence mentioning oleander "the most poisonous when the flower blooms" shows that the ancients knew its toxicity.
But such a poison, even the ancients were aware of its toxicity, but with the development of the times, why has it not been abandoned by people, but can still be seen everywhere in our cities.
Oleander in the city
Although oleander is highly poisonous, people will not be poisoned if they do not come into close contact with it or eat it by mistake, although it is a beautiful poison that can be easily touched, it still has a very good value.
It can be seen from the ubiquitous appearance in the city that oleander has a characteristic that has attracted many greenery aspects, that is, because it has a very good purifying effect.
Oleander has a very large absorption effect on harmful gases in the air, compared with other plants, oleander can absorb a lot of harmful gases in the air, which is the biggest advantage of being regarded as a green plant.
The surface of the oleander plant has this very special waxy layer, which has a very good adsorption effect on the industrial waste gas in the city, and the harmful gases such as sulfur dioxide and hydrogen fluoride discharged into the air by the industry can be effectively absorbed by oleander.
While absorbing harmful gases to purify the surrounding air, oleander can also quickly convert it into oxygen, which makes it a proper environmental protection expert, and is even called "environmental protection guard".
For the environment in the city, automobile exhaust and other domestic exhaust gases are the biggest threat to the urban environment, and the existence of oleander is the nemesis of these exhaust gases, which shows the ideal status of oleander in urban greening.
The oleander also has a strong ability to survive and grow, it can thrive without too much care, and it also has a good ornamentality, which is why it can be seen everywhere in the city, and it is only its environmental advantage, in fact, oleander has greater value.
The value of oleander
The planting of oleander in the city is nothing more than its environmental protection value and ornamental value, but in addition, oleander has a more important value.
In the industrial aspect, oleander fruit is one of the very good industrial raw materials, although the fruit of oleander contains toxicity, but it also has a very rich oil, after refining and processing, it can produce lubricating oil and other products, which is widely used in industry.
Among its branches, there are rich fibers, which are a pure natural textile raw materials, and also have a good use in the textile industry, but these are not its greatest use value.
The greatest value of oleander is its toxic substances, and the role of these substances in medicine is its most outstanding point.
Although people can be poisoned by mistake, it can play a very important role in medicine when properly treated.
The glycosides in oleander can make people poisonous, but in medicine it can make a very good cardiotonic agent, which is a kind of gospel for heart patients, but it also needs to be properly treated, and there will still be poisoning reactions when eaten by mistake.
It can be said that oleander has a wide range of applications in the medical field, and in traditional Chinese medicine, the ancients developed its medicinal value, which can be said to have an irreplaceable role in the eyes of traditional Chinese medicine.
There are often hidden dangers behind beautiful affairs, and oleander is such an existence, although it has a very great value, but also a beautiful plant, but we still have to understand its dangers, do not easily touch this kind of affairs, so as not to bring danger to ourselves.