"Huanxi Sha" Qing Dynasty Nalan Xingde
Duckweed wandering has no roots, and the wanderer of the world does not ask.
Duckweed is a plant that likes to float on water. The ancients thought that duckweed had no roots, so they could scatter around, in fact, duckweed had roots, but its roots were very short and thin, so it could not be inserted into the soil to grow firmly. The vitality of duckweed is very tenacious, as long as there is water, there are traces of it, including some stinky ditches and sewage ditches. Duckweed can be fed to fish as a kind of fish feed, but farmers are afraid to grow too much in ponds. Because duckweed will compete with the fish for oxygen in the water, too much will cause the fish to turn over the "white belly" due to lack of oxygen, and it is necessary to increase oxygen quickly, otherwise the consequences will be very serious.
In ancient materia medica, this product is mostly named after waterweed. "New Cultivation of Materia Medica": "There are three kinds of water pings, and the big one is called apple." There are also water chestnuts in the water, which are also similar, and the leaves are round. The duckweed on the water, the main fire sore". Because of the clinical use of "small duckweed", such as "Tujing Materia Medica": "Apple, rarely used in today's medical prescriptions", the name of "duckweed" is often used in prescription books. In the Qing Dynasty, some of the herbs were renamed duckweed, and duckweed was different from green and purple weed. The medicine is preferably purple-backed duckweed, also known as purple-backed duckweed, and purple duckweed.
Chinese medicine
Traditional Chinese medicine duckweed is a dried whole herb of the duckweed family. It is produced in most parts of the country. Harvested in June ~ September, washed, impurities removed, and dried. This product has a slight gas and light taste. It is better to have a green color and a purple back. Raw.
This product has a spicy taste and is cold. Return to the lungs and bladder meridians. It has the effect of dissipating wind and heat, dialysis and itching, diuresis and swelling.
Note: The predecessors believed that this product had strong sweating power, so the "Materia Medica" said that "those who are deficient in qi and sweat should not use it".
In the Qing Dynasty, the "Medicinal Solution of Yuqiu" proposed that the traditional Chinese medicine duckweed was "Xinliang published" to treat "plague spots", "carbuncle fever and swelling", "hidden rash itching", "bayberry", "acne", "sweat spots" and so on. The modern application of duckweed is mostly focused on dispelling wind and relieving itching, diluting water and reducing swelling, etc., and its effects of diaphoretic and epithetization, diarrhoea, cooling blood and detoxification, etc., are also used clinically.
"Compendium of Materia Medica": "The water used in the "Materia Medica" is a small duckweed, not a big apple, and Tao Su is wrong with the big apple note. Pingzhi and Ping, although the sound is similar, the words are different, and the shape is also different. There are many duckweed in the pond everywhere, and the spring season is born. One leaf is sued, that is, several leaves are born, and there are micro whiskers under the leaves, that is, its roots. A kind of one with a green back. A kind of person with a blue face and a purple back is like blood, which is called purple ping, and it is good to use medicine. Picked in July. Purple-backed duckweed, picked in July, picked clean, dried with a bamboo sieve, and placed a basin of water under it, that is, easy to dry. ”
"Materia Medica": "Shui Ping, its body is frivolous, its nature is dry, and it can dispel dampness and heat. If the heat is depressed on the skin, it will be itchy, and the taste will be pungent and the air will be cold; Therefore, it can dissipate the dampness and heat of the skin. Cold can remove heat, dry can remove moisture, so water vapor. The wine is damp and hot, and the quality of Ping does not sink in water, its smell is pungent and cold, light and clear, so it can win wine. If the blood is hot, it must be scorched and easy to fall, and if the blood is cold, it must be clear and must grow from it. The Lord of "Beilu" quenches thirst, and the evil of dampness and heat is gone, then the fluid grows by itself, and the thirst is self-quenching. It is said to be down, to bathe those who grow hair, and also to use cold to remove heat, and to cool the blood. "
Modern pharmacology
Traditional Chinese medicine duckweed mainly contains flavonoids: orientalin, isoacetin, luteolin-7-monosaccharide glycoside, apigenin-7-monoglycoside, rutin, etc.; Organic acids: 5-p-coumarylquinic acid, 5-caffeoylquinic acid, etc. It also contains tannin and lipid compounds.
Traditional Chinese medicine duckweed has antipyretic and antibacterial effects. Duckweed has a diuretic effect, and its active ingredients are mainly potassium acetate and potassium chloride. Duckweed water extract has a cardiotonic effect and can constrict blood vessels and increase blood pressure.
Time: 2024