There are some woodlands with downy birch and rowan. At the western side are extensive reed beds and swamps of downy birch and willows. These include willow, downy birch, alder and krushinnik. The most common tree species are the native Norway spruce, Scots pine and Downy birch. Silver birch can easily be confused with the similar downy birch ("Betula pubescens"). The leaf margins also differ, finely serrated in downy birch, coarsely double-toothed in silver birch. Silver birch ("Betula pendula") was more affected than downy birch ("Betula pubescens"). Downy birch extends farther north into the Arctic than any other broadleaf tree. Species of tree and shrub include ash, downy birch, hazel, hawthorn, yew and rowan. Caucasian downy birch (Betula pubescens) and European rowan (Sorbus aucuparia). They include grey willow and downy birch and the occasional aspen in damper areas. The peat bog contains trees ("Pinus sylvestris" and "Betula pubescens" (downy birch)) and Ericaceae.