Angara-Chunsky interfluve (Boguchansky district of Krasnoyarsk region) - a remote and currently insufficiently floristically studied area is located in the southern taiga subzone of Middle Siberia on the border of three floristic provinces (Altai-Yenisei oro-hemibemiboreal, Tungusska-Lena boreal, Baikal hemiemiboreal) and covers an area of about 20 000 km². The boundaries of the study area are: the northern one is the left bank of the Angara river, the southern one is the right bank of the Chuna river, the western and the eastern are the same as the administrative border of the Boguchansky district. Active economic development and, as a result, the increasing anthropogenic loading, the fires, require attention behind a condition of a vegetable cover, the organization of monitoring and cause the purpose and research problems – identification of  composition, structure and features of flora. Listed floristic finds in the territory of the Angaro-chunskiy interfluve collected in 2015-2016 in the vicinity of settlements: Boguchany, Govorkovo, Manzya, Osinovyj Mys. For the first time on the territory of the research, found species of flowering plants for the Chuno-Onsky floristic area: Carduus nutans, Chamaerhodos erecta, Cynoglossum officinale, Leonurus quinquelobatus, Linum perenne, Lychnis sibirica, Medicago lupulina, Polygonum boreale, Polygonum sabulosum, Scutellaria scordiifolia, Solanum nigrum, as well as rare in this area species: Nuphar lutea, Odontites vulgaris, Polygonum rectum. For each look coordinates, geographical collection points, habitats, dates of collecting are specified. The map of the area of a research with the indication of collection points is provided. The obtained data allow to specify the distribution and northern borders of areas of a number of types confirming the available division into districts in the territory of Middle Siberia.