Longan

is a plant of the genus Longan in the family Sapindaceae. Evergreen tree, usually more than 10 meters high; branchlets stout, puberulent, scattered pale lenticels. Leaves with stipe 15-30 cm or longer; leaflets 4-5 pairs, thinly leathery, oblong-elliptic to oblong-lanceolate, often asymmetric on both sides; petiolules usually no more than 5 mm long. Inflorescences large, much branched; pedicels short; sepals subleathery, triangular-ovate; petals creamy white, lanceolate, subequal to sepals, puberulent only outside; filaments hispidulous. Fruit subglobose, usually yellow-brown or sometimes gray-yellow, outside slightly rough, or rarely with slightly convex tubercles; seeds tea-brown, shiny, all covered with fleshy aril. Fl. spring-summer, fr. summer.

Longan

Longan is native to the southern region of China, distributed in Fujian, Taiwan, Hainan, Guangdong, Guangxi, Yunnan, Guizhou, Sichuan and other provinces (regions), mainly in Fujian, Taiwan, Guangxi. Growing in the southern subtropical region, preferring warm and humid climate, it can tolerate short-term frost, and will not freeze to death in a short period of time under the low temperature condition of 0-4℃.

Economic use to fruit-based, because its aril is rich in vitamins and phosphorus, beneficial to the spleen, brain function, so also into medicine; seeds contain starch, after appropriate treatment, can be brewed; wood is solid, very heavy, dark reddish-brown, resistant to water and moisture, is a shipbuilding, furniture, fine craftsmen and other fine materials.

Morphological features

Evergreen tree, usually more than 10 meters high, between as high as 40 meters, up to 1 meter diameter at breast height, with the root of the board of the large trees; branchlets stout, puberulent, scattered pale white lenticels. Leaves with stipe 15-30 cm or longer; leaflets 4-5 pairs, rarely 3 or 6 pairs, thinly leathery, oblong-elliptic to oblong-lanceolate, often asymmetric on both sides, 6-15 cm long, 2.5-5 cm wide, apically mucronate, sometimes slightly obtuse-acuminate, base extremely asymmetric, upper side broadly cuneate to truncate, several parallel to leaf axis, lower side narrowly cuneate, ventral surface dark green, glossy, dorsal surface flourish green, both surfaces glabrous; lateral veins 12-15 pairs, raised only abaxially; petiolules usually not more than 5 mm long.

To calm the mind and nerves. Longan is rich in vitamin B, rich in protein, and fructose and minerals, so cinnamon we can use it to decoct. The elderly or cerebrovascular patients, if his memory or concentration or memory loss, can be used to improve the cinnamon; in addition, longan it also has a tranquilizing effect, commonly used in the insomnia of the crowd, because the cinnamon it is rich in proteins and vitamins can be nutritious nerves, so it has the role of tranquilizing the mind. Of course, cinnamon is not suitable for anyone to eat, there must be a doctor for diagnosis and treatment.

The efficacy and role of longan

1, beneficial to the blood, enhance memory: cinnamon is rich in substances that we believe that we understand, it is because of the existence of these substances it can help us to replenish the blood, especially beneficial to the brain cells, can enhance the memory, eliminate fatigue.

2, tranquilize the mind: we eat cinnamon every day, then can also help us effectively alleviate the effect of insomnia, this is because cinnamon (longan dry) contains a lot of iron, potassium and other elements, can promote the regeneration of hemoglobin, and cinnamon (longan dry) contains up to 2.5 mg of niacin (per 100 grams), can be used for the treatment of dermatitis caused by a lack of niacin, diarrhea, dementia, even mental disorders, etc.

3, nourishing blood and fetal safety: pregnant women in pregnancy is also can eat cinnamon, this is because cinnamon (dried longan) containing iron and vitamins are more, can reduce contractions and sagging feeling for accelerated metabolism of pregnant women and fetal development is beneficial to the role of fetal safety.

4, antibacterial, inhibit cancer cells: animal experiments show that cinnamon (dried longan) on the JTC-26 tumor inhibition rate of more than 90%, has a certain inhibitory effect on cancer cells. Clinical to cancer patients oral cinnamon crude extract, symptoms improve 90%, prolonging the effect of life about 80%.

5, lipid lowering and heart protection, delay aging: cinnamon meat (dried longan) can lower blood lipids, increase coronary blood flow. On the aging process is closely related to the flavoprotein - brain B-type monoamine oxidase (MAO-B) has a strong inhibitory effect.

Dietary taboos of longan

Taboos

Longan is a hot and humid food, easy to eat stagnant qi, should not be eaten when there are symptoms of inflammation. Within the phlegm fire or yin deficiency fire, as well as wet stagnation stop drinking people avoid eating; where the tongue is thick and greasy, gas congestion and bloating, intestinal slippery diarrhea, wind-cold cold, indigestion, avoid eating; dried longan contains high natural sugar, and thus diabetic patients avoid eating; acne, surgical carbuncle boils, women's pelvic inflammatory disease, urethritis, menstrual period of those who also avoid eating; longan hot and help the fire, so the children and adolescents should be eaten sparingly; longan is suitable for fresh food, the taste of the The particles should not be eaten.

1, internal phlegm fire and dampness stop drinking people avoid serving.

2, women after pregnancy, most of the yin and blood deficiency, yin deficiency is born with internal heat. Chinese medicine advocates cool before the fetus, and longan hot, therefore, in order to avoid miscarriage, pregnant women should be cautious.