river birch

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A deciduous eastern North American tree (Betula nigra) found along river banks and other wet areas, having grayish to reddish-brown bark that peels off in papery flakes.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark