[Pharmacognostic identification of Calystegia soldanella].

Objective: To identify Calystegia soldanella and provide foundation for its further study and application.

Methods: Scanning electron microscope (SEM), upright microscope and UV were applied in the research.

Results: Laticifers were observed in the cortex and phloem of root, sclerenchymatous cells were cyclized in the outer phloem of stem, the stomas present on both adaxial and abaxial epidermis, the stomatal type was paracytic. Observed by scanning electron microscope, stomas distributed on and sank into both adaxial and abaxial epidermis; The surface of guard cells were smooth, and subsidiary cells were smooth or veined, the veins were perpendicular to guard cells on adaxial epidermis, while the veins were irregular on subsidiary cells of abaxial epidermis. And the absorption peaks were significantly in UV scanning spectrum: the ethanol extract had an absorption peak at 324nm; While the chloroform extract's at 241nm, 296nm and 316nm.

Conclusion: Bases on the characteristic identification, micro-identification and physicochemical identification, SEM is further used in the identification of micro-morphological characteristics of Calystegia soldanella, and it will raise the accuracy of the identification of Calystegia soldanella.