sweet birch

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

• noun An eastern North American tree (Betula lenta), having rough, dark brownish bark and twigs that smell of wintergreen.
• noun The wood of this tree.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A tree of the species Betula lenta, with a dark bark resembling a cherry tree's and an aromatic bark and sap used for birch beer.

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

• noun common birch of the eastern United States having spicy brown bark yielding a volatile oil and hard dark wood used for furniture