Specially protected natural areas are critical to the conservation of biological and landscape diversity as a basis for sustainable development. The natural monument of regional significance «System of Un-Novyinklor and Ai-Novyinklor lakes» is a unique protected natural area and centre for environmental education of the inhabitants of the Beloyarskiy district, Khanty-Mansi Autonomous Okrug - Yugra. One of the main tasks of the natural monument is to preserve natural complexes, plant communities, rare and red-listed plant species. The uniqueness of these lakes is primarily manifested in their clean and clear water, that is why for many years Un-Novyinklor lake has served as a reliable source of drinking water for the residents of Beloyarskiy. Currently, the vegetation cover in the area of wet pine forests is in active restructuring. Coastal sedge communities are formed in the place of those forests on the flat regularly flooded areas. The physiognomie of vegetation cover and species composition of plant communities serve as an indicator of the whole complex of ecological conditions for natural ecosystems habitats. The study of the current state of the natural monument is of great scientific importance. Based on the results from both field and laboratory research in 2011 and 2016, an inventory of flora was conducted and geobotanical characteristics of the main types of plant communities of forest, marsh and coastal water vegetation of the natural monument and its protected zone were given.