In the central part of the Appalachian mountains, there is a wide variety of deciduous and coniferous trees. Some vegetation in higher parts are white spruce, balsam fir and black spruce and feather moss.In the lower elevations by rivers are different.ost of the ranges found in the United States. The mountains are for the most part low because of the erosion. Over time the Appalachian’s sharp peaks have eroded and turned into smooth mountains and hills. The Appalachian region also has many rivers.