Identification method
Microscopic identification
Root cross section: The cork layer is 2-6 cork cells, sometimes falling off. The phloem rays are broad, and the bast beam is narrow, forming a layer of loops. Xylem vessels are sparsely arranged with wood fibers and woody parenchyma cells around. Mucinous cells are scattered in the parenchyma and contain calcium oxalate crystals; thin ink cells are filled with starch grains, and some contain calcium oxalate clusters.
Powder characteristics: light reddish brown.
1 The starch granules have a single stick shape, oblong shape, long oval shape, kidney shape, flat triangular shape, or rhombic shape, some of which are pointed at both ends, and have a diameter of 3-13 (-26) μm long to 25 (-43) μm. The stratification is not obvious;
2 Calcium oxalate crystals scattered or bundled in the mucous cells, needle crystal length 86-169μm.
3 mucous cells are round or oval, 108-224μm long, 66-91μm in diameter, containing light yellow mucus, and some containing needles.
4 Calcium oxalate cluster crystal diameter 25-78μm, large angular edges, and some similar to square crystal.
5 Edged pitted catheters were 35-60 (-83) μm in diameter with bordered pits arranged in a ladder-like or mesh-like pattern, and pits were linear in shape.
6 [6] The thin-walled cells of wood thin-walled cells are slightly thicker, with bead-like, single-slotted holes of various sizes. In addition, there are stone cells, wood fibers and cork cells.
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