Cordyceps sinensis grows in alpine meadow at an altitude of 3800 to 5000 meters, which requires high environment and cannot be planted artificially at present. Therefore, this product is a rare pure natural treasure. In the trend of returning to nature in today's world, Cordyceps sinensis is expensive, so there are some counterfeit and confused products on the market, so we should pay attention to identification.
The identification points are as follows:
First, the characteristics. The insect body is like a silkworm, 3 ~ 5 cm long and 3 ~ 8 mm in diameter; Appearance yellowish brown to khaki, rough, with obvious ring lines. The head is reddish brown and has a daughter seat; The chest and abdomen are dark yellow to yellowish brown, with 3 chest segments, 3 pairs of chest feet, abdominal segments 10, 5 pairs of abdomen feet and 4 pairs in the middle. There are 20 ~ 30 links on the surface; Crispy, light yellow part. The pedestal is slender and cylindrical, slightly twisted, generally longer than the insect body, with grayish brown to brown surface, fine longitudinal wrinkles and slightly enlarged head; The texture is flexible and the cross section is white and fibrous. The smell is slightly fishy and the taste is slightly bitter.
2. Microscopic identification. The cross section of the insect body is irregular, surrounded by sharp bristles and long hairs of different lengths. There are a lot of hyphae in the body, and there are cracks between them; The cross section of the pedestal is composed of ascomycetes, oval to ovoid, and the lower part is buried in the concave pedestal. There are many linear ascomycetes in ascomycetes, and each ascomycete has 2~8 linear ascospores. The center is covered with hyphae, and there are cracks between them. In the sterile part, there is no ascocarp at all.
At present, the following adulterations are common in the professional market of Chinese herbal medicines:
1. Cordyceps Liangshan: The worm body is short and thick, the surface is brown and black, with numerous ring lines and rusty fluff. The base is much longer than the worm body, up to 30 cm, and the branches are slender and tortuous. The head of the fruiting body is completely cylindrical or rod-shaped. The feet are not obvious.
2. Ground silkworm: the tuber of ground silkworm in Labiatae. It is spindle-shaped, slightly curved, light yellow or grayish black in appearance, with only 2- 1 1 root mark, and the section is crisp and white. Soaking in water is easy to swell and obvious nodules appear.
3. Pupa grass: commonly known as Cordyceps militaris, the insect body is oval pupa, the base head is oval, the top is blunt and round, there is no sterile end, orange yellow or orange red, and the handle is slender and cylindrical.
4. Branched Cordyceps sinensis: This product is yellow-green, with solitary or branched stroma, 5~8 cm long, curved stalk, black, longitudinal wrinkles or edges, smooth upper part and fine fluff at the lower end. The head of fruiting body is short cylindrical and dark brown.
5. Use corn flour, flour, gypsum, etc. Processing molds pretend to be Cordyceps sinensis. This kind of counterfeit product is huge in volume, yellow-white or brownish red in appearance, smooth and obvious in ring pattern, neat in section, pale white, heavy in weight, and sticky in teeth for a long time. The fruiting body has no fine longitudinal wrinkles.
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