guelderrose'

from The Century Dictionary.

• noun Viburnum Opulus, especially the cultivated form of that species; the snowball-tree. See Viburnum and cranberry-tree.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) A cultivated variety of a species of Viburnum (V. Opulus), bearing large bunches of white flowers; -- called also snowball tree.

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

• noun deciduous thicket-forming Old World shrub with clusters of white flowers and small bright red berries