THE WHITE MULBERRY.
M. alba, Linn.
The white mulberry is a native of northern China and Japan. From this region it has been extensively intro duced into all warm temperate climates. Its white berries are of negligible character. It is the leaves that give this oriental mulberry a unique position in the econo mic world. They are the chosen food of silkworms. No substitute has ever robbed this tree of its preeminence, maintained for many centuries in its one field of useful ness.
The hardy Russian mulberries are derived from M. alba. These have done much to enrich the horticulture of our Northern states, but the parent tree, though it thrives in the eastern United States and in the South, has not been the means of establishing silk culture on a paying basis in this country.