Da Qing Ye (大青叶), is the leaf of woad (菘蓝), a plant of the family Cruciferae. Green is indigo, and blue is the grass that can refine indigo. Blue seeds of blue solid first contained in the "Ben Jing", while the big green first contained in the "Famous Medical Doctors". Dazheng has nothing to do with indigo. However, the later generations mistakenly thought that the big green is blue, so they mixed it up, and later abandoned the use of big green and used the blue leaves as big green leaves. Woad leaves for genuine big green leaves, polygonum leaves called polygonum big green leaves. Functions clearing heat and detoxification, cooling blood and eliminating spots.

Big Green Leaf is the leaf of the cruciferous plant woad (Woad or glastum; Isatis indigotica). Woad was mentioned in the last Slate, so if you missed it, check it out in Reply 76.

The idiom "青出于蓝" comes from Xunzi - Counseling Learning: "青，取之于蓝而青于蓝", "青" means indigo, which is similar to the color blue, and "蓝" means the grass that makes indigo. What kind of plant is blue? The Shennong Ben Cao Jing first recorded the "blue fruit", is the blue seeds, but did not describe the blue specific for what.

In ancient times, there is no chemical dyes, only natural dyes made from plants, used to make blue dyes more and more plants, are called blue. The Tang Materia Medica recorded three kinds: woad, wood blue, polygonum blue; Song Dynasty and more horse blue. Nowadays, wood blue has been eliminated, leaving only woad, polygonum, horse blue three kinds of blue, due to the traditional dyes are less and less, these three kinds of blue processed indigo is mainly used to make medicine, that is, qingdai.

What is the relationship between dazhongye and blue? The earliest record of Dazheng leaves is found in the "Famous Doctor's Record", called "Dazheng", at that time Dazheng and blue have no relationship. But later people assumed that because the blue can extract the green, it is mistakenly thought that the blue is the big green, the blue leaves called the big green leaves.

Now scholars after examination, it is generally believed that the "Famous Medical Doctors" of the big green for the Verbenaceae plant big green wood (Mayflower Glorybower; Clerodendrumcyrtophyllum Turcz), commonly known as roadside green. Its leaves are supposed to be veritable big blues. However, due to the more common application of the blue leaf, the leaves of the true big green wood were in turn left out of the herbal stage.

Since there are many kinds of blue, which blue leaves are actually the leaves of the Great Green Leaf? Historically these blue leaves have been used as big green leaves, respectively: Cruciferae woad, Jurassicaceae horse blue, Polygonaceae polygonum blue, leguminous family of wood blue, plus Verbenaceae big green wood, the drug market across the country had appeared in five kinds of big green leaves.

"Green from the blue" is actually which kind of blue? At present, it is generally recognized as polygonum blue (Persicaria tinctoria), and some people think it is woad. The Chinese People's **** and State Pharmacopoeia in order to standardize, will be listed as the leaves of woad leaves, while the leaves of polygonum blue is known as polygonum big green leaves. As for the blue seeds of blue solid, has long ceased to be applied, out of the stage of traditional Chinese medicine.

The medicinal value of Da Qing Ye

Clearing heat and removing toxins, cooling the blood and eliminating spots

Da Qing Ye and the root of Panax quinquefolium is a plant, Da Qing Ye is the leaves of woad, Panax quinquefolium is the root of woad, the efficacy of the medication is similar to that of the application of reference. The leaves can be used in the treatment of the plague, but also often used in the real fire evidence, manifested as sore throat, mouth and tongue sores, and so on. Daqing Ye also has a cool blood effect, used for heat caused by dengtoxin, as well as heat into the camp blood caused by dizziness, hair spots, etc., and now also often used in the treatment of purpura.

How to apply the big green leaf

The big green leaf is generally not known, many people still only know the blue root of the board, and the big green leaf is called the leaves of the board. In fact, the more accurate name is woad leaves. Woad leaves can be picked three times a year, and after drying, they are big green leaves.

If you pick the leaves while they are fresh and tender, they can also be eaten as a very good vegetable. The taste is said to be similar to kale. There are many recipes: kale root boiled soup, vegetarian fried kale root, kale root stewed pork tendon. Googled the following several:

White burnt blueberry root

This dish is made in the Yunnan restaurant, the public comment in the many people recommended. Probably because it is not common, many people just to taste. This blue root is actually woad leaves, also known as big green leaves, the tender seedlings poured into the hot oil, put some chili, stir fry immediately out of the pot. It is said to have a hint of bitterness, but is refreshing and flavorful. If you know the effect of the big green leaves, you will understand that it can clear the throat. I would also like to have a chance to taste it.

Cold Mixed Panna Cotta

This is also a recipe found on the internet, blanch the woad leaves in boiling water, pass them through cool water, squeeze out the water; add fine julienne of chili peppers, and then put in soy sauce, chili oil, sugar, sour and spicy fresh dew to blend into a sauce, pour it on the woad leaves, and stir it to be ready. It's just a pity that I haven't seen fresh big green leaves for sale, otherwise I would have bought them to try.

Banlangen hot pot

This is even more peculiar, also found on the network. Hot pot restaurant side dishes with woad leaves, this is not peculiar. Remember what we said about green is better than blue, right, in this hot pot has been confirmed, the woad leaves into the hot pot to cook for a period of time, the soup will become dark blue (cyan), and the pot of bacon are also dyed blue. Isn't it interesting.

The following passage is for those who study medicine and understand it naturally.

The Divine Husbandman's Classic of the Materia Medica: blue real: bitter cold flavor. The main solution to all poisons, kill parasites, injection ghosts, stings. Taken for a long time, the head is not white, light body. Sang Pingze.

"Famous Doctors": blue real: non-toxic. Its leaf juice, kill a hundred poisonous drugs, antidote coyote poison, shooting the poison. Its stems and leaves can be dyed green. Born in Hanoi.

"Famous Doctors Bibliography": Da Qing: bitter flavor, cold, non-toxic. Mainly treats headache, fever, mouth sores.

"Treatise on the Nature of Medicine": Chen, sweet flavor. It can remove great heat, and treat cold and heat of the epidemic.

Rihua Zi Materia Medica: Treatment of fever and wind, heart boredom, thirst and dry mouth, children's nose fever, crazy rash, Tianxing fever and gold stone poison, and coating medical swollen poison.

"Materia Medica": the ancient recipe for typhoid yellow sweat, jaundice, etc., there is a big green soup. And the treatment of typhoid fever head and body strong, lumbar and spinal pain, Pueraria lobata soup is also used. For the most part, it is often used for current illnesses.

"Compendium of Materia Medica": Da Qing gas cold, taste slightly bitter and salty, can solve the heart and stomach heat and poison, not especially for typhoid fever. The living book" treatment of typhoid fever hair red spot pain, there are rhinoceros horn jujube soup, big green four things soup. Therefore, the "Finger Palm Fugue" cloud: Yang toxicity is crazy spot annoyance, to the big green ascending hemp, can be back to sleepy Dudu. The main hot poisonous diarrhea, jaundice, paralysis of the throat, Dan poisoning.

"Materia Medica Classic": Qing endowed with the most Yin gas, so the taste is bitter, the gas is cold and non-toxic. Zhen Quan Yun: Daqing Chen, taste sweet, can go to the big heat, the treatment of temperature and epidemic cold and heat. Cover the cold and bitter, it can dissolve the evil heat is clear. Scripture said; big hot gas, cold to take it, this is also said. Time line fever headache, fever mouth sores, for the stomach family evidence of real heat, this drug is a good medicine for the disease.