708 ARBORETUM ET FRUTICETUM BRITANNICUM. 
M. subalba nervésa Hort. — Leaves strongly marked with thick 
white nerves on the under side. 
% M. a. 7 itélica Hort. M. itdlica Lodd. Cat. ed. 1836. — Leaves 
lobed. The plant bearing this name in the Jardin des Plantes has 
the soft wood, or cambium, of the current year’s shoots of a deep 
red, when the bark is removed. 
* M. a. 8 rosea Hort., Lodd. Cat. ed. 1836. The smali white Mulberry ; 
Muarier rose, Feuille rose, Fr, — One of the kinds called in France 
a wild variety. : 
' # M.a. 9 columbassa ‘Lodd. Cat. ed. 1836. Columba, F'r.— Small 
delicate leaves, and flexible branches. ; 
# M. a. 10 membrandcea Lodd. Cat. ed. 1836. Miirier & Feuille de Par- 
chemin, Fr. — Large, thin, dry leaves. 
* M.a. 11 sinénsis Hort. M. sinénsis Hort.; JM. chinénsis Lodd. Cat. 
ed. 1836; the Chinese white Mulberry, Amer. — A large-leaved 
variety. ; 
& M.a. 12 pimila Nois.? M. a. nana Hort. Brit. — A shrub, seldom 
exceeding 10 ft. high. 
Other Varieties. All the above sorts are in the arboretum. of Messrs. 
Loddiges ; but in the catalogues of foreign nurserymen there are several 
other names, most of which will be found enumerated and described in our 
Ist edition, including JZ. constantinopolitana Poir. (A. byzantina Sied.), 
which we believe to be nothing more than a rather distinct variety of JZ, alba. 
1382, Morus dlba. 
The white mulberry is readily distinguished from the black, even in winter, 
by its more numerous, slender, upright-growing, and white-barked shoots. It 
is a tree of much more rapid growth than M. nigra, and its leaves are not 
only less rough and more succulent, but they contain more of the glutinous 
milky substance resembling caoutchouc, which gives tenacity to the silk pro- 
duced by the worms fed on them. The rate of growth of young plants is 
much more rapid than that of M. nigra; plants cut down producing shoots 
4 or 5 feet long in one season ; the tree attaining the height of 20 ft. in five 
or six years; and, when full grown, reaching to 30 or 40 feet. Its duration 
is not so great as that of MZ. nigra. The white mulberry is more tender than 
