white mulberry

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

• noun A mulberry (Morus alba) native to China and naturalized in North America, having edible whitish or purplish fruit. It is widely cultivated for its leaves, which are used as food for silkworms.

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

• noun A short-lived mulberry tree, native to northern China, used in traditional Chinese medicine.

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

• noun Asiatic mulberry with white to pale red fruit; leaves used to feed silkworms