Chuanxiong's Health and Drug Identification
Identification of raw herbs
Character identification
The rhizome is an irregular nodular fist-shaped mass with a diameter of 1.5-7 cm. The surface is tan-to-yellow-brown, coarsely shriveled, with a large number of parallel bulging segments; the top has round-like, dimple-like stalks, and the lower side and the rim have a large number of tiny, nodular root marks. Solid, hard to break, cross-section yellow-white or gray-yellow, with wavy ring formation layer, the whole scattered yellow-brown oil. Strong aroma and special residual, bitter, pungent, slightly sweet, with a linen tongue. It is better to have a large, full-bodied, solid, yellow-white cross section, large oiliness, and strong aroma.
Microscopic identification
Kawashima
Cross section of rhizome: The cork layer is more than 10 cork cells. The cortex is narrow. The phloem is broad and scattered with root trails. Form a layer of wavy or irregular polygons. Xylem irregular polygon. The xylem vessels are polygonal or round in shape, and are mostly single row or "V" open with occasional wood fiber bundles. The pith is larger. The parenchyma contains most of the oil cells, which are round, oval, or irregular, light brown, and have a small oil chamber near the formation. Parenchyma cells are rich in starch grains, and some contain calcium oxalate crystals.
Powder characteristics: light yellow brown or gray brown.
1 Starch granules are oval, oblong, round, ovoid, or kidney-shaped and have a diameter of 5-16 μm. About 21μm in length, umbilical point-like, long-slit or herringbone-like; complex grain consists of 2-4 grains.
2 Calcium oxalate crystals are round-like clumps or round clumps with a diameter of 10-25 μm.
3 Cork cells are dark yellow-brown, often overlapping in multiple layers, polygonal in surface view, and thin in wall.
4 The oil chamber is broken and the secretory cells contain more oil droplets.
5 The catheters are mostly threaded catheters, and some thickened walls of threaded catheters are connected to each other, with a million-mesh thread catheter. There are also reticulates, ladders, and flanged holes with diameters of 14-50μm.
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