Character identification: 1, West rhubarb. Refers to the wild species produced in Qinghai, Gansu, Gannan Autonomous Prefecture, Gannan County, etc., commonly known as "Xining Rhubarb", egg Ji (a uniform, whole, shaped like a duck egg); Katsuragi (root head, slitting valve was Flake)); Kyrgyzstan (cross-section of roots and leaves); Su Ji (refer to the tail root, a little light, and the original character of the wedge-shaped), and so on. The surface is tan, and there is a small hole in the shade before each thread. The quality of the body is solid, with betel nut on the cross section, showing white flesh of red meat and clear texture (weaves). The gas is fragrant, the teeth bite with gravel, sweet and bitter. It is a good product in rhubarb.
Xining box yellow and yellow package specifications, yellow box diameter of not less than 0.3 centimeters (the middle section and the bulk of the roots are not good not to box yellow) to the net rough and fine skin light. Bao Huang in both the middle section or medicine block, take a net cork, surface brown and dark brown, weight is loose. Red and white cross section (Betel nut) or yellow, texture red and white, smell the same box yellow, ranging in size, but the diameter should not be less than 0.15 cm. There is no more than 15% of sugar hearts.
2, cool yellow. It refers to wild products produced in Wuwei (Liangzhou), Zhangye and Hexi regions of Gansu Province. The rhizome is irregularly shaped like a dog's head, commonly known as the dog's head rhubarb), or it is slit into valves and does not cork. The surface is dark brown, with horizontal wrinkles and longitudinal grooves, and it is hard-bodied. Red and white cross section (Betel nut) red meat white ribs, texture chaos. Gas fragrance, sweet and bitter taste. The teeth have a stronger gritty sensation, a sticky sensation, and excellent quality. It is a treasure of rhubarb.
3, drowning rhubarb. Department of governance in Li County, Gansu Province, Ganxian, Suichang, Wudu and other places (cultivation) phenol egg Ji, Ji Ji, Zhongji, Su Ji four. Go to the net cork, the surface is brown, firm weight. Red and white cross section (Betel nut), ray texture is clear, most of the small vortex rays, arranged in an irregular ring, gas fragrance, slightly bitter taste, is also a product of rhubarb. Because of its good redness, exports are the mainstay.
4, Wen Huang. Refers to the Wudu area in Gansu Province, the adjacent area to the pole, including Shimizu. A longitudinal segment of a rhizome. Go to the net cork. The surface is yellow or yellow-brown and firm in weight. Red and white cross section (betel nut) or yellow, gas smell, bitter taste, quality slightly.
5, Ya Huang. Refers to western Sichuan, Dege and Yunnan wild products. The goods are horseshoe-shaped and divided into four classes. 1,2, etc. to the net cork. The surface is yellow or brown or yellowish green inside and outside. Hard weight or quality is more relaxed. Cross section without texture of red meat white ribs. 3, 4 and so do not cork. Surface brown, with horizontal wrinkles, lighter or lighter foam, cross-section yellow-brown or green-brown. 4 and so on is irregular block, regardless of size, both with root. (gas micro, bitter, habits that quality is inferior.)
6, South rhubarb. Refers to the Yellow River planted products in eastern Sichuan, Hubei, Guizhou and Shaanxi. The rhizomes were cut transversely and the cork was debrided. The surface is tan. Hard weight. Cross section yellow or yellowish green. Gas smells astringent and bitter.
In addition there are:
1 Rheum rhaponticum: It is processed from the thin roots of the rhubarb and the tail of the main root. About two centimeters in diameter, about 5 to 10 centimeters in length. Cork did not go to the net. Surface brown, more longitudinal wrinkle. Cross section was striated. Some of the stuffy dark brown. It is a defective product of Gansu rhubarb.
2 Tibetan Rhubarb: Some of the products in the Changdu area are similar to Yahuang. However, in recent years, such areas as Nagqu and Nyingchi have developed. Specifications have not been finalized. Mostly long petaloid, 6 to 15 cm long, about 3 to 6 cm in diameter, with skin or scraping cork ranging. The surface is brownish or tan, most of them are hung with ropes, dried or dried, and there are many lines in the internal malleolus. Because the time of excavation is not terribly horrible, the color of the internal hustle is not the same, and the quality of the blister is not equal. In addition to the disorder of the original plant, some non-medicinal rhubarb was mixed and it needs to be improved in the future.
All kinds of medicinal rhubarb are of solid quality, evenly cut, betel nut section, gas aroma, sweet, bitter but not astringent is better.
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