Sp. Pl. 2: 986. 1753
Phenology: Flowering spring–summer.
Habitat: Disturbed areas, woodland margins, fencerows, dry to moist thickets
Elevation: 0-1500 m
Ont., Ala., Ark., Colo., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., Europe, native to e Asia.
Morus alba is sometimes planted and possibly naturalized in Arizona, California, and New Mexico. It is reported from Washington as a local escape.
Mulberry leaves provide the natural food for silkworms. Commercially cultivated mulberries are varieties of Morus alba; they are prized as shade trees with edible fruits.
Morus alba and M. rubra are both highly variable and are often confused. Both species have deeply lobed to entire leaves and are variable in pubescence. Some individuals are intermediate in leaf pubescence, suggesting the possibility of hybridization.
Native Americans used infusions made from the bark of Morus alba medicinally in various ways: as a laxative, as a treatment for dysentary, and as a purgative (D. E. Moerman 1986.