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[Objective]To study the pharmacognostic characteristics of Polygonum chinense L.[Method]A research was carried out on the morphological,macroscopic and UV-Vis spectrum identification of P.chinense.[Result]Viewed from cross section,the cortex is narrow,and phloem forms into a ring in the P.chinense root;the pericycle fibers are arranged in strips in stem;about 2 to 6 main vein vascular bundles are arranged in a ring,both sides of which have lignified fiber bundles;the leaves have round secretory cells and multicellular glandular hairs on upper epidermis; the multicellular glandular hairs,anisocytic stomata or anomocytic stomata are found on the lower epidermis of leaves;there are many glandular hairs,secretory cells,pollen grains,crystal fiber sheaths,brown compartmentalization,and starch grains in the crude powder of P.chinense;five kinds of P.chinense extracts all have absorption peaks at the wavelength of 200 to 800 nm in the UV-Vis spectrum.[Conclusion]Based upon morphological,macroscopic and UV-Vis spectrum identification,the pharmacognostic characteristics of P.chinense were researched.This study can provide a reference for identification,development,utilization and quality standard of P.chinense.
[Objective] To study the pharmacognostic characteristics of Polygonum chinense L. [Method] A research was carried out on the morphological, macroscopic and UV-Vis spectrum identification of P. chinense. [Result] Viewed from cross section, the cortex is narrow, and phloem forms into a ring in the P.chinense root; the pericycle fibers are arranged in strips in stem; about 2 to 6 main vein vascular bundles are arranged in a ring, both sides of which have lignified fiber bundles; the leaves have round secretory cells and multicellular glandular hairs on upper epidermis; the multicellular glandular hairs, anisocytic stomata or anomocytic stomata are found on the lower epidermis of leaves; there are many glandular hairs, secretory cells, pollen grains, crystal fiber sheaths, brown compartmentalization, and starch grains in the crude powder of P.chinense; five kinds of P.chinense extracts all have absorption peaks at the wavelength of 200 to 800 nm in the UV-Vis spectrum. [Conclusion] Based upon morphological, macro scopic and UV-Vis spectrum identification, the pharmacognostic characteristics of P. chinense were researched. This study can provide a reference for identification, development, utilization and quality standard of P. chinense.