red mulberry (Morus rubra) is frequently spoken of simply as mulberry, and is sometimes called black mulberry.
The red mulberry grows to be a large dense, round-headed tree, with thick fibrous roots and milky sap.
The red mulberry is quite common and grows in over two-thirds of the United States.
The red mulberry (M. rubra) is an American species, with leaves too rough to be good for silkworms, and very indifferent fruit.
red mulberry is present in most woodlands of eastern Kansas and is seemingly distributed by birds.
It is sometimes called the red mulberry to distinguish it from the following species.
But the silkworms would not cooperate—they refused to eat the leaves of the red mulberry tree.
late 14c., developed from 13c. morberie, or cognate Middle High German mul-beri (alteration by dissimilation of Old High German mur-beri, Modern German Maulbeere); both from Latin morum "mulberry, blackberry," + Old English berie, Old High German beri "berry." The Latin word probably is from Greek moron "mulberry," from PIE *moro- "blackberry, mulberry" (cf. Armenian mor "blackberry," Middle Irish merenn, Welsh merwydden "mulberry"). Children's singing game with a chorus beginning "Here we go round the mulberry bush" is attested from 1820s, first in Scotland.