Alnus incana
The area of which makes it 85.9% of the total area of the park, is occupied by forest. Water (mostly lakes) occupies 9.2% of the area, swamps — 2.9%. The most common tree species are birch (Betula pubescens, Betula pendula), alder (Alnus incana), spruce (Picea abies), and pine (Pinus sylvestris). A special type are oak forest (about 0.1% of the total forested area), which are in the park at their northern range.