326 MANUAL OF GARDENING 
Mulberry, Morus rubra.* 
White mulberry, M. alba. 
Russian mulberry, M. alba var. Tatarica. - 
Teas’ weeping mulberry is a form of the Russian. 
Pepperidge or gum-tree, Nyssa sylvatica.* 
One of the oddest and most picturesque of our native trees; especially 
attractive in winter; foliage brilliant red in autumn; most suitable for low 
lands. 
Iron-wood, hop hornbeam, Ostrya Virginica.* 
A good small tree, with hop-like fruits. 
Sourwood, sorrel-tree, Orydendrum arboreum.* 
Interesting small tree native from Pennsylvania in the high land south, and 
should be reliable where it grows wild. 
Plane or buttonwood, Platanus occidentalis.*tt 
Young or middle-aged trees are soft and pleasant in aspect, but they 
soon become thin and ragged below; unique in winter. 
European plane-tree, P. orientalis. 
Much used for street planting, but less picturesque than the American; 
several forms. 
Aspen, Populus tremuloides.* 
Very valuable when well grown; too much neglected (Fig. 33). Most of 
the poplars are suitable for pleasure grounds, and as nurses for slower grow- 
ing and more emphatic trees (p. 41). 
Large-toothed aspen, P. grandidentata.* 
Unique in summer color; heavier in aspect than the above; old trees 
become ragged. 
Weeping poplar, P. grandidentata, var. pendula. 
An odd, small tree, suitable for small places, but, like all weeping trees, 
likely to be planted too freely. 
Cottonwood, P. deltoides (P. monilifera).* 
The staminate specimens, only, should be planted if possible, as the cotton 
of the seed-pods is disagreeable when carried by winds; var. aureat is one 
of the good golden-leaved trees. 
Balm of Gilead, P. balsamitfera* and var. candicans.* 
Desirable for remote groups or belts. Foliage not pleasant in color. 
