Is the "yellow cauliflower" in the park green space beautiful and delicious? Be careful of these summer flowers. Shanghai Park | Green Space | Summer Flowers
There are still two days before it's summer heat. In the hot climate, many spring flowers have entered their dormant period, while some summer flowers are in their blooming period, fearlessly blooming under the scorching sun. Plant experts remind citizens and tourists to be wary of many seemingly beautiful summer flowers and not to touch or consume them without experience.
Xuancao has slender leaves and beautiful flower colors, making it one of the few excellent garden ornamental flowers that bloom in summer. In China, Xuancao has a cultivation history of at least 3000 years. In ancient times, wanderers would go on a long journey by planting Xuancao in the North Hall, hoping to alleviate their mother's longing for their child and forget their worries.
The picture of Xuancao is still a valuable edible and medicinal plant, and its nickname "yellow cauliflower" is deeply ingrained in people's minds. At present, the edible "yellow cauliflower" is recognized to be composed of four closely related original species in the genus Hemerocallis, namely yellow cauliflower, northern yellow cauliflower, small yellow cauliflower, and Hemerocallis.
However, this does not mean that the Xuancao in Shanghai's parks and green spaces can be consumed directly. Yao Enyang, an engineer at Shanghai Botanical Garden, said that the Xuancao in the park's green space belongs to a hybrid horticultural cultivation variety, not a native species of yellow cauliflower, and is not edible. Moreover, fresh Hemerocallis flower buds contain a certain amount of colchicine, which can cause poisoning and symptoms such as vomiting and diarrhea if consumed untreated.
In the midsummer season, day lily in Qidong County, Hengyang City, Hunan Province enters the peak harvest season, and local vegetable farmers rush to pick day lily during the farming season Xinhua News Agency
Farmers ship picked day lily in Daba Village, Hui 'anbao Town, Yanchi County, Ningxia Xinhua News Agency
Be even more careful with the oleander that can be seen everywhere in summer in Shencheng.
After being damaged, oleander will secrete white milk containing the toxin cardiac glycoside. If ingested by mistake, it can cause gastrointestinal reactions or toxic reactions to the heart and nervous system, and in severe cases, even lead to death.
According to reports, on a late night in June 2003, a young man in Shanghai had suicidal thoughts and swallowed a large amount of oleander near the railway in Taopu Town, causing him to roll on the ground in pain. Fortunately, the police arrived in time and rescued him from the hands of death.
In December 2005, an elderly person living on Nanmatou Road in Shanghai believed in folk remedies and boiled oleander leaves in hot water before giving them to his grandson who had inflamed gums and ulcers in his mouth. Fortunately, the child found the taste bitter and only licked it. He also remembered an episode in the animated series that specifically talked about the toxicity of oleander, so he quickly rinsed his mouth with water and went to the hospital for examination, which was not a big deal.
There is an episode in the animated film "Black Cat Sheriff" that tells the story of oleander being poisonous. The oleander powder floats onto the leeks by the windowsill, the yellow dog eats it and takes it to the hospital, while the fox with poor digestive system does not eat it and escapes danger
Experts suggest keeping a distance from oleander and quietly appreciating it is also very beautiful. Being too close can be risky and can easily damage the mood. In case of poisoning and seeking medical attention, the benefits outweigh the losses.
It is reported that plants with white milk are the most abundant, except for plants in the Oleander family, plants in the Moriaceae, Euphorbiaceae, Asteraceae, Papayaceae, and Convolvulaceae families may all contain white milk.
It is not recommended to touch or consume plant liquids without experience to avoid danger. These liquids are likely weapons that plants have evolved over a long period of time to fight against various enemies such as bacteria, viruses, fungi, insects, and mammals.
Since images are toxic, why should they be widely planted in cities?
Taking oleander as an example, besides its red, pink, and white main colors being very attractive during the off-season for flower appreciation, its environmental protection effect is also prominent.
According to research, the leaves of oleander have a strong resistance to harmful gases such as sulfur dioxide, carbon dioxide, hydrogen fluoride, and chlorine, and are not afraid of dust. Even if the whole body is covered in dust, it can still grow vigorously, earning it the reputation of a "green vacuum cleaner".
The root system and soil form a root soil complex, which can improve the strength and deformation characteristics of the soil, jointly bear external loads, and effectively enhance the ability of slope soil to resist erosion and erosion.
In the field of carbon reduction, oleander has also shown impressive performance. According to research from the Shanghai Botanical Garden and the Shanghai Chenshan Botanical Garden, the "king of roadside trees" in Shanghai, including camphor trees, maple leaves, wax plums, oleander, and privet, can fix 100 to 500 grams of carbon dioxide and release 72 to 360 grams of oxygen in just one day.
As early as the early construction of the Shanghai Botanical Garden in the 1970s, oleander had already been showcased and promoted as an ornamental and environmental protection plant. As long as citizens and tourists kept a distance from them, they could enjoy flowers rationally.
