sentences:  The northern part of the country is formed of lowland in the Bweru Bugesera region and has two lakes, Cohoha and Rweru; this region is distinct for its "Cyperus papyrus" vegetation.The forest area is limited to , and the wetlands account for (about 5% of the total area of the country).The montane forest, which occupied nearly 33 to 50% of the country in the past, is mostly denuded and only a patch of of closed forest is recorded on the banks of Lake Tanganyika.