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Citrullus vulgaris Schrad. SI GUA


The watermelon, xi gua (western melon) is also called han gua (cold melon). It is an annual vine. The fruit is ball shaped or oval, with a diameter of 200-600mm more or less. The skin is smooth, glossy and deep green, light green or grey-green, and frequently shows dark vertical stripes.

The juicy part of the fruit differs with varieties, and may be red, yellow or white, etc. The flavor is sweet and the moisture content is very high. The seeds are brown-red or black.

The juicy part of the fruit, including the skin, has a flavor that may be sweet or insipid. Its nature is cool and it contains no poison. The fruit can cool the body during hot weather, relieve thirst and benefit the urine.

The seed kernel has a sweet flavor, its nature neither hot nor cold. It is nourishing, and can moisten the intestines.

The 'frosting' has a salty flavor and a cool nature. It is cooling during hot weather, and can benefit the throat.

The melon flesh contains fructose, glucose, sucrose, salts (the main composition of which is sylvite), amino acids, organic acids, enzymes, many vitamins, lycine, volatile compositions etc.

The seed contains oil, protein, vitamin B2, citrulline, lauric acid, palmitoleic acid, etc.


1. HEAT STROKE; LACK OF STRENGTH; THIRST WITH VOMITING. Take an appropriate measure of fruit, crush, squeeze, and obtain the juice. Drink 1-2 cups at regular intervals until relief is obtained.

2. FEVER, WITH DRY MOUTH AND THIRST; STOMACH FEELING HOT AND A BITTER TASTE IN THE MOUTH; BAD BREATH. Take 500-1000 grams of melon and eat it. Do this 1-2 times a day.

3. URINE, BRIEF AND YELLOW; PAIN WHEN URINATING; PAIN IN THE URINFEROUS TUBULE. Take 500-1000 grams of melon and eat it. Do this 2-3 times a day.

4. HIGH BLOOD PRESSURE. Take 30 grams of watermelon skin and 30 grams of gambir plant (Uncaria rhychophylla). Simmer in water and drink in the place of tea.

5. DIABETES. Take 30 grams of watermelon skin and 30 grams of winter melon skin. Steam in water and serve. Do this 3 times a day, every day.

6. NEPHRITIS LEADING TO DROPSY. Take 60 grams of melon skin and 60 grams of fresh Japanese raspberry root, simmer in water and drink in place of tea.

7. CONSTIPATION DURING PREGNANCY OR IN THE AGED. Take 15 grams of seed kernels and crush. Add 15 grams of candied honey and an appropriate amount of water. Steam in a sealed container for half an hour. Do this once a day for 3 successive days.

8. WEAKNESS AFTER AN ILLNESS; WEAKNESS AFTER CHILDBIRTH. Take 6 grams of seed kernels, 6 grams of black sesame seed, 30 grams of rice and 30 grams of brown sugar. Add water and grind into a paste. Boil (with more water) until cooked and eat. Do this once a day for 10 days.

9. HANGOVER. Take 500-1000 grams of fruit, slice and eat, or take 60 grams of skin, steam in water and serve.

10. MOUTH, TONGUE SORE, GUMS SWOLLEN AND SORE; BLISTERS AND FESTERING INSIDE THE MOUTH. Take some watermelon 'frosting' and apply to the affected parts.

1. SEEDS. Collect the seeds, wash and dry in the sun. When required discard the shell and obtain the kernel.

2. SKIN. Use a knife to cut off the skin, leaving it 5 mm thick, and dry this in the sun. This is how it is used in traditional medicine.

3. FROSTING. Select a watermelon weighing 2500-3000 grams. Make a hole at the stem end of the fruit, removing some of the flesh, and place inside 500-700 grams of Glaubers salt. Replace the skin and use a slip of bamboo to hold it in place so that the hole is sealed. Hang the melon in a cool, well ventilated place for ten or more days, when a white frosting will be found to form on the outside. Brush this off and use for medicinal purposes.

Do not use the frosting if suffering from a weak stomach or spleen.











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