SUMMARY
Introduction. Acoruscalamus L. is a perspective medical plant for complex use in medicine.The aim of the study – comparison of the quantitative content of essential oil and its component composition in the rhizomes and leaves of calamus, establishing the prospects for using leaves, revealing the morphological and anatomical diagnostic features of leaves as a new raw material.Research Methods. The content and composition of the essential oil were studied using the CMS method, the microscopic characteristics of the raw material – generally accepted analytical methods.Results and Discussion. A comparative analysis of the quantitative content and qualitative composition of the essential oil components of the acoruscalamus were conducted. The established diagnostic morphological and anatomical signs of the leaves will be used in the development of normative documentation – quality control methods (QCM) for additional raw materials.Conclusion. The results of the studies indicate the prospect of further pharmacognostic study of the leaves of the calamus as an additional and accessible raw material.