The Chinese medicinal herb "Da Jiugu" grows in grassy slopes or thickets. It is distributed in Sichuan, Yunnan, and other places. It has high medicinal value and can be used to treat cough and lung heat. Today, the editor of Traditional Chinese Medicine Network will analyze it in detail for you!
[Treating Cough and Lung Heat with Da Jiugu]
Take 5 grams of Da Jiugu root (peeled), 2 grams of Xianglingcao (Herba Cirsii), and 2 grams of Wacao (Herba Geranii). Grind them into powder, take 2 grams each time, and take it twice a day.
Traditional Chinese medicine believes that Da Jiugu has the functions of clearing heat, detoxifying, relieving cough, and relieving pain. It is commonly used for cough and lung heat, mastitis, parotitis, carbuncle, and traumatic injuries.
"Compilation of National Chinese Herbal Medicines": "Clears heat, detoxifies, relieves pain, and stops coughing. It is used to treat cough and lung heat, parotitis, mastitis, and carbuncle and abscess."
[Characteristics of Da Jiugu]
Identification of characteristics
Cylindrical, 3.7-7.5 cm long, grayish-white or light brown on the surface, opaque. If the outer skin is not removed, there may be 3-4 rings and longitudinal lines, and one layer of outer skin can be peeled off, resembling fibrous. Obvious knife marks can be seen. There is a depression or protruding stem scar at the top. The texture is solid, not easily broken, and the section is not flat, resembling a woody texture. Slightly aromatic, slightly bitter taste.
Microscopic identification
Powder characteristics: Light brown.
① Numerous starch grains, single or compound. Single grains are round, helmet-shaped, or axe-shaped, a few are irregular quadrilaterals, with a diameter of 3-8-13μm. Larger starch grains occasionally have a "cross" shaped hilum, and the layers are not obvious. Compound grains are composed of 2-4 sub-grains; sub-grains are often helmet-shaped, semi-circular or triangular.
② Calcium oxalate cluster crystals are present in the inner layer of the cork and the thin-walled cells of the cortex, with a flower-like or pointed crystal petal, with a diameter of 8-26μm.
③ The vessels have reticulate patterns, with a diameter of up to 80μm, with inclined end walls and elongated pits; fragments of vessels with large pitted bordered pits can also be seen.
④ The wood parenchyma is in the form of blocky pieces, with cells being rectangular or elongated, and the walls slightly thickened.
