white birch

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

• noun Any of several birch trees having white bark, as Betula pendula of Europe or the paper birch B. papyrifera of North America.

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

• noun European birch with dull white to pale brown bark and somewhat drooping hairy branches