What do yam leaves look like?

Yam, commonly known as yam. Perennial herb with creeping stems, usually purplish, cylindrical roots, opposite leaves, oval or oval flowers, and dioecious. Root tuber contains starch and protein, which is edible. Morphological characteristics: the rhizome is thick and straight, and the length can reach 1 m. Leaves alternate, opposite to the middle or upper part, rare or 3-whorled, usually with bulbils between leaf axils, and the shapes of leaves vary from triangular oval to triangular wide oval, usually 3-lobed to deeply lobed. The flowers are dioecious, very small, green and white, all spikes, the male inflorescence is erect, and the female inflorescence is below. Capsule has three wings. Perennial twining herbs; Having huge or rhizomatous underground stems; Leaves alternate, sparsely opposite, simple or palmately compound, fully split or fully split; Flowers dioecious; Rarely the same plant, forming spikes, racemes or panicles; Tepals in 6, 2 whorls, connate at base; Stamens 6, sometimes 3 develop and 3 degenerate; Female flowers are similar to male flowers, but stamens are degenerated or missing; Ovary inferior, 8-loculed, style 3, separate; Capsule or berry; A winged seed. Nutritional analysis 1. Spleen and stomach, digestion: Yam contains amylase, polyphenol oxidase and other substances, which is beneficial to the digestion and absorption function of the spleen and stomach. It is a dual-purpose product of medicine and food. Both spleen yang deficiency and stomach yin deficiency can be eaten. Clinically, it is often used to treat spleen and stomach weakness, anorexia, fatigue, diarrhea and other diseases; 2. Tonifying kidney and replenishing essence: Yam contains a variety of nutrients, which has the functions of strengthening the body, tonifying kidney and replenishing essence. Generally, it is kidney deficiency, nocturnal emission, frequent urination and other symptoms. Can be taken; 3. Benefiting lung and relieving cough: Yam contains saponin and mucus, which has the function of lubricating and moistening dryness, so it can benefit lung qi, nourish lung yin and treat lung deficiency, excessive phlegm and chronic cough; 4. Lowering blood sugar: Yam contains mucin, which has the function of lowering blood sugar, can be used to treat diabetes, and is a good diet for diabetics; 5. Longevity: Yam contains a lot of mucin, vitamins and trace elements, which can effectively prevent the deposition of blood lipids on the blood vessel wall, prevent heart disease, and achieve the effects of benefiting the heart and calming the nerves and prolonging life; 6. Anti-hepatic coma In recent years, studies have found that yam has a sedative effect and can be used to resist hepatic coma. Yam tuber contains diosgenin) 0. 0 12%, dopamine (dopamine), bataxine hydrochloride, polyphenol oxidase (polyphenol oxidase), allantoin (abscisic acid) Ⅱ. It also contains glycoprotein which can be hydrolyzed into lysine, histidine, arginine, aspartic acid, threonine, serine, glutamic acid and proline. Glycine, alanine, valine, leucine, isoleucine, tyrosine, phenylalanine and methionine. It also contains free amino acids including the above amino acids, cystine and γ -aminobutyric acid, and also contains polysaccharides with hypoglycemic effect, and contains mannose, glucose and galactose in the molar ratio of 6.45:1:65438+. It also contains barium, beryllium, cerium, cobalt, chromium, copper, gallium, lanthanum, lithium, manganese, niobium, nickel, phosphorus, strontium, thorium, titanium, vanadium, yttrium, ytterbium, zinc and zirconium, as well as sodium oxide, potassium oxide, alumina, iron oxide, calcium oxide and magnesium oxide. The rhizome contains dopamine, catecholamine, cholesterol, ergosterol, campesterol, stigmasterol and β -sitosterol. Mucus contains phytic acid, mannan, Ia, Ib and ic. Some people say that mucus contains 40% polysaccharide, 2% protein, 3% phosphorus and 24% ash. The polysaccharide part consists of 80% mannose and a small amount of galactose, xylose, fructose and glucose. Pearl bud (Reiyoshi) contains five distributed plant growth regulators named batatasin Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅴ. It also contains tetrandrine, dopamine and various sterols: cholesterols, (24R)-α- methyl cholesterols [(24R)-α- methyl cholesterols], (24S)-β- methyl cholesterols [(24S)-β- methyl cholesterols]. (24R)-α- ethyl cholesterol [(24R)-α- ethyl cholesterol], cholesterol, campesterol, (24S)-β- methyl cholesterol [(24S)-β- methyl cholesterol], 24- methylene cholesterol (24- methyl cholesterol). Isfucosterol, lathosterol, 24- methylene -25- methyl cholesterol, 7- cholesterol, 8( 14)- cholesterol [cholesterol -8( 14)- enol], (24R)-α- methyl-8 (/kloc) (24S)-β- methyl -8( 14)- cholesterol [(24S)-β- methyl cholesterol -8( 14)- enol], (24R)-α- ethyl -8( 14)-. The tuber of Dioscorea nipponica Makino contains triterpenoid saponins, allantoin, choline, 17 amino acids (less than the free amino acids contained in Dioscorea opposita) and inorganic compounds (less than the inorganic compounds contained in Dioscorea opposita). It also contains dioscoran)A, B, C, D, E and F with hypoglycemic activity. Edible people can be eaten by the general population 1. Suitable for patients with diabetes, abdominal distension, physical weakness after illness, chronic nephritis and long-term diarrhea; 2. Yam has astringent effect, and people with dry stools should not eat it; In addition, evil spirits should not eat yam. Note: yam and kansui should not be eaten together; Nor should it be taken with alkaline drugs.