Forests in the northern part of the country represent the southern edge of the boreal forest. The northern boreal forests comprise 84.7 per cent of the total forested area. The most common tree species are Siberian larch (Larix sibirica), Siberian pine (Pirns sibirica), Scots pine (Pinus sylvestris), Siberian spruce (Picea obovata), Siberian fir (Abies sibirica) and a smaller, broad-leafed component composed of birch (Betula platyphylla), aspen (Populus tremula) and poplar (Populus diversifolia).