sweet pepperbush

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

• noun A deciduous shrub (Clethra alnifolia) growing in moist ground from Maine to Texas and having long racemes of small fragrant white or pink flowers.

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

• noun Clethra alnifolia, a deciduous flowering shrub of North America.

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

• noun shrub of eastern and southern coastal United States having beautiful racemes of spice-scented white flowers