Topicality. The herb of Monarda fistulosa L. cultivated in the Russian Federation is one of the promising sources of essential oils, flavonoids and other biologically active compounds. The problem of standardization of raw materials of this plant is not fully resolved. Objective. The article is aimed at specification and addition of anatomical and histological signs of leaves and stems of Monarda fistulosa, as well as at the study of the luminescent features of their tissues. Materials and methods. The material of the study was the stems and leaves of the Monarda fistulosa, collected in the flowering period in July 2017 in the Botanical Garden of Samara University. The experiment was carried out by the method of light microscopy in transmitted and reflected light on a light field in accordance with the requirements of the monograph of the State Pharmacopoeia of Russia, XIV edition. Results. The article presents the results of a morphological and anatomical study of the herb of Monarda fistulosa. Additionally, the diagnostic features of the studied plant were determined, and the luminescence features of the tissues of the stems and leaves were also described. Conclusion. The obtained data allow us to develop a section “Microscopic signs” of the Pharmacopoeial monograph for the new type of medicine plant material - “herb of Monardae fistulosae”.