Duckweed

Duckweed

(Tang materia medica)

[synonyms] Ping (Erya), Shuiping, Shuihua (Ben Jing), Fu Lei, Sui (Guo Pu's note to Erya), pingzicao (fill the gap behind the elbow), Shuibai, shuisu (BIE Lu), xiaopingzi (collection of Materia Medica), duckweed (TU Jing of Materia Medica), hydrophytes (pinhui essence), shuilian, jiuziping (Qunfang PU), Tianping (records of traditional Chinese Medicine).

[source] the whole plant of duckweed or duckweed.

[plant morphology] 1. Duckweed with purple back (Shengji Zonglu), also known as Ziping (Huainan wanbizhu), ziduckweed (Shiyi daoxiao Fang).

Perennial floating plants. The leafy stem is flat, obovate or elliptic, 3-6 mm in diameter and 6-9 mm in length. Its apex is round, green and glossy on the top and purplish red on the bottom. It is often connected by 3-4 pieces. It has more than 10 fibrous fibrous roots drooping from the center. There is a vascular bundle in the center and a root cap at the end of the bundle. Spathe short, lip shaped. The inflorescence consists of two male flowers and one female flower, white or light green. It blooms in summer.

Of lakes, ponds, or fields. It is distributed all over China.

② Qingping

Similar to the above species but smaller, the leafy stem is obovate or oblong, 2-6 mm long, green or dark green on both sides. The root is solitary, drooping in water, without vascular bundles, and has a blunt cap at the apex. The flowers are small and white. The flowering period is from April to June.

Growing in a pool, lake, or still water. It is distributed all over China.

[collection] from June to September, they were harvested and dried in the sun.

[chemical constituents] duckweed contains potassium acetate, potassium chloride, iodine and bromine.

Azolla contains many water-soluble vitamins such as vitamin B1, B2, C, luteolin-7 - β - glucoside. 8-hydroxyluteolin-8 - β - glucoside and other flavonoids, iodine, bromine and other substances. Its polysaccharide is a rich source of d-coriander. It also contains resin, wax, steroids, chlorophyll, sugar, protein, mucilage, tannin, etc.

[pharmacological action] 1. Effects on cardiovascular system

Qingping water extract has cardiotonic effect on frog heart failure caused by quinine. Calcium can enhance it. Large dose of Qingping water extract can stop the heart in diastolic phase, and can contract blood vessels to increase blood pressure.

② Antipyretic effect

Qingping Decoction and its extract (2G / kg) were given orally to rabbits with fever caused by injection of typhoid mixed vaccine, which proved to have weak antipyretic effect.

③ Other functions

The results of antibacterial and antimalarial tests showed that Azolla was negative, and it could kill Culex pipiens larvae and pupae in laboratory and field.

It is pungent and cold.

① Ben Jing: "it tastes pungent and cold. "

② Bielu: "acid, nontoxic. "

③ "South Yunnan Materia Medica" says: "cold in nature, bitter in taste. "

④ Yilin zuanyao: "Xin, Ping, salty. "

[meridian tropism] entering lung meridian.

① "Gangmu": "entering lung meridian. "

② "Lei Gong processed medicine solution": into the lung, small intestine two channels. "

③ "Into the liver and spleen. "

Functions and indications: sweating, dispelling wind, moving water, clearing heat and detoxifying. It is used to treat febrile disease, impervious macular rash, wind heat addiction rash, skin itching, edema, dysmenorrhea, tinea, erysipelas and scald.

① "Ben Jing" says: "it can warm up the body, itch, drink, grow hair and stop thirst. "

② Bielu: "to breathe, to bathe, to grow hair. "

③ "Tang Materia Medica": "main fire sores. "

④ "Materia medica Shiyi": "apply surface anhydride at the end of the powder; take it by pounding juice, which is mainly for edema and urination; take Pingzi to dry the powder violently, and take a dagger with square inch wine; and take it by ointment to grow hair. "

⑤ Rihuazi materia medica: "it can cure heat toxin, wind heat disease, fever mania, melting swelling toxin, soup fire sore, rubella. "

⑥ "The book of materia medica:" when treating fever, you can sweat. "

⑦ "Diannan Materia Medica": "sweating, detoxification. It can cure scabies, scabies and itch. "

⑧ Compendium: "it is mainly used for rheumatism, paralysis, beriberi, flapping injury, red eyes, sore mouth and tongue, hematemesis, bleeding, paralytic wind, erysipelas. "

⑨ "Yuluoyaojie": Xinliang published. It is used to treat pestilence, macula, apoplexy, paralysis, carbuncle, gangrene, heat swelling, cryptorash, pruritus, waxberry, acne and perspiration. "

⑩ According to the record of Lingnan medicine collection, "if you are suffering from rheumatism, take a bath with duckweed on the back of purple for several times; if the water is poisonous, it is cold from hand, foot to elbow and knee, and then soak it with boiling water. "

(11) illustrated book of Chinese medicine and plant: "insect bites caused by ramming juice.". "

[usage and dosage] oral administration: decoct soup, 1-2 yuan (fresh 0.5-1 Liang); mash juice or put into pill or powder. External use: fumigation with boiling water, sprinkle with grinding powder or adjust and apply.

[should avoid] 1. In the book of Materia Medica, it says: "do not use it if you are sweating due to deficiency of Qi. "

② "Materia Medica from the new": "it's not a big heat, you can't try it lightly. "

③ "To match Materia Medica": "blood deficiency, skin dryness, Qi deficiency, wind pain, both banned. "

[prescription selection] ① for seasonal febrile disease and sweating: one or two duckweed herbs, half Ephedra (removing nodes and roots), half cinnamon and half aconite (removing umbilicus and skin). Four things pound fine screen. For each serving, take one cup of water, add ginger for half a minute, and fry until six minutes. Take it hot with water regardless of time. (Ben Cao Tu Jing)

② Treatment of skin wind heat, all over the body addiction rash: Burdock, duckweed, etc. To mint soup tune down two money, two daily service. (prescription for health preservation)

③ Treatment of body itching: Duckweed powder a money, Scutellaria a money. Stir with Siwu Decoction. (Dan Xi Bian Yao)

4. The fever is thirsty, and the mind is restless: the water is washed, dried and dried, and the cow milk and pills are large Wutong. Take 30 pills with porridge regardless of time. (Sheng Hui Fang)

⑤ Treatment of diabetes: dry duckweed, trichosanthes root, etc. On two taste for the end, to human milk and pills such as Wuzi. Take 20 pills on an empty stomach, three days a day. (duckweed pill in Qian Jin Fang)

⑥ Treatment of heat poison: Duckweed mash juice, apply it all over. (secret records of son and mother)

⑦ Cure gale pestilence: one duckweed is picked in March, washed for three or five times, scented for three or five days, baked at the end, and can't see the sun. Three yuan per serving, warm wine before eating. In February and July, take the duckweed with purple back, dry at the end of the day, half a liter, into haoxiaofeng powder. Five yuan per serving, water fried frequently drink; still with fried soup bath. (ten good prescriptions)

⑧ Carbuncle treatment: appropriate amount of Ziping, juice, red fennel (crabs) root skin powder, a spoonful. Apply the medicine evenly, thin in the middle and thick outside, and leave a hole in the middle. (selected materials for investigation of unilateral and verified prescriptions)

⑨ For the treatment of dysuria, bladder distension, water and air flow swelling: Duckweed on the water, sudden dry, end, take Fangcun dagger, three times a day, (Qianjin Fang)

⑩ Treatment of acute nephritis: Duckweed grass two liang, black beans one or two. Take it in water. (selected materials of new medical treatment of Chinese herbal medicine, Inner Mongolia)

(11) to cure sore and rash, I can't bear the pain, I'm afraid to hurt my eyes: Duckweed grass, dried in the shade as the end, take one or two money each time, use half a catty of sheep liver, put it into the basin, and stab it with bamboo sticks. Pour water and half together, strangle liver juice, adjust the medicine after eating. (duckweed powder in general micro prescription for children's health)

(12) treatment of vitiligo: Duckweed with purple back, dried in the sun. Each with four two fried bath, and wipe it with Ping. Or enter Han Fangji two money also can. (Pocket recipe)

Ji Zhi Fen Zi Mian an: Xiaoping, the end of the ditch, daily application of it. (Sheng Hui Fang)

(14) detoxify the snake's venom into the abdomen: drink it by pounding and wringing the duckweed. (pinhui Essentials)

To cure epistaxis: dry duckweed grass powder, blow into the nose. (Sheng Hui Fang)

(16) treatment of pterygium: a little green duckweed, research rotten, a little into the brain, stick to the eye. (Shi Yi De Xiao Fang)

[discussion of famous experts] 1. Supplement to the meaning of materia medica: "Shuiping, sweating, especially Mahuang. "

② "Gangmu": "duckweed, its light nature, into the lung, up to the skin, so can carry forward the evil sweat. "

③ "The classic of materia medica:" Shuiping, its body is light and frivolous, its nature is clear and dry, it can also be used as a medicine to dispel dampness and heat. If the heat Qi is depressed on the skin, it itches, tastes pungent and the Qi is cold, so it can disperse the damp heat of the skin. Cold can get rid of heat, dryness can get rid of dampness. Wine is hot and humid, and the quality of Ping is not deep in water, its smell is pungent and cold, light and clear, so it can win wine. Blood heat makes the hair dry and easy to fall. Cooling blood makes the Ying Qi clear and makes the hair grow. In bielu, people who are thirsty go away with the evil of dampness and heat, then the body fluid will grow and the thirst will stop itself. It is called Xiaqi, which produces hair by bathing. It can also remove heat by cold and cool blood. "

④ Zhang Shouyi said: "duckweed is the most frivolous, so it can spread Lung Qi on the top, reach skin and hair on the outside, sweat to release heat, and pass water on the bottom. It is within the scope of Benjing, bielu, and other Ming schools. However, it is not only specialized in Qi division, but also clearing blood heat. Therefore, Shengji is not only good at treating hematemesis, Shenghui prescription is also good at treating epistaxis, and near the lake is good at treating eye redness and mouth sores. It is good at clearing fire, but also heat conduction. Recently, people only think it is a medicine for sweating, but they don't know how to clear away heat. And its quality is the lightest, and its smell is thin. Although it is called sweating, its nature is not warm, so it will not worry about excessive sweating. "

Chinese PinYin : Fu Ping