The book contains research papers of the XVII International Scientific and Practical conference «Problems of Botany of South Siberia and Mongolia» in the following directions: geobotany and resource management; study of vegetation in Altai, Siberia and Mongolia; molecular methods of studying plants and chemosystematics; morphology and biology of individual species; plant protection; the role of botanic gardens in the study and reservation of plant biodiversity; flora of southern Siberia, Mongolia and neighboring countries; plant ecology and phytoindication; systematics of individual taxa, Reconstruction of the natural environment based on microbiomorphic and paleobotanic researches.For specialists in the field of botany, ecology, environmental protection and for all interested in questions of the study, protection and rational use of flora.