The book N. I. Kuznetsova "Caucasian species of the genus and their significance in the history of the development of the flora of the Caucasus", published in 1910, is an important scientific work devoted to the study of the flora of the Caucasus. The author analyzes the different types of plants found in the region and their importance in the context of the development of the vegetation of the Caucasus. The book provides detailed information about plants growing in mountainous and mountainous regions of the Caucasus, including species characteristic of the alpine and subalpine zones, as well as lower-lying areas. Historical development of flora: Kuznetsov focuses on the evolutionary development of Caucasus vegetation, describing how climatic and geographical changes influenced the formation of the region's flora. It considers how the flora of the Caucasus interacted with the flora of other territories, including the Mediterranean and Asia. Endemics and rare species: Particular attention is paid to endemic and rare plant species characteristic only of the Caucasus. The author emphasizes their importance for the preservation of the biological diversity of the region and their role in ecosystems. Flora and man: The book also discusses the importance of Caucasian plants for local residents, their use in traditional medicine, agriculture and everyday life. Kuznetsova is a valuable source for the study of the natural heritage of the Caucasus of the early XX century and retains historical value for further research in the field of floristry and ecology. An enlarged format (34 x 23 cm), a soft cover.