202 FOREST TREES. 
to plant the young trees eight feet apart each way, as 
directed for the Norway Spruce, and afterwards fill the 
intermediate spaces with trees of easier propagation 
and culture, to be cut out as the Pines increase in size. 
The Lombardy Poplar and White and Golden Willow 
are best for this purpose. The Silver Maple is less 
suitable on account of its rigid horizontal branches. + 
The leading shoots of the Pines are very tender while 
growing, and are easily broken or injured, so that 
care must be taken that the branches of the other 
trees do not overtop or in any way interfere with 
them. After the Pines have reached the height of 
ten or fifteen feet they may be pruned as directed for 
the Larch. 
The seeds ripen early in autumn, and must be 
gathered immediately, as the cones open for their 
release by the first of October, and in some seasons 
earlier. 
2. Pinus Cembra—Cembran Pine, Stone Pine. 
Leaves, two to three inches long, triangular, dark 
green; sheaths, deciduous; cones, three inches long, 
ovate, erect, with obtuse, slightly hooked scales. 
The Cembran Pine grows on the Alps, where, in 
some places, it forms large forests. It is also found in 
Siberia. It appears to be, ordinarily, a tree of mode- 
rate size, although some speak of it as growing very 
large. The wood is highly esteemed in its native 
countries. It is soft, very durable, and the grain is 
so fine as to be scarcely perceptible. Itismuch used 
for carving and for the wainscoting of houses. It 
