938 FOREST CULTURE AND 
giata, Desf., the Lombardy Poplar. Greatest height 
one hundred and fifty feet. Growth rapid, like that 
of all other poplars. Wood soft, light, and of loose 
texture, used by joiners, coopers, and turners, furnish- 
ing, also, superior charcoal. Bark employed in tan- 
ning. The tree requires damp soil. 
Populus tremula, L.—The European Aspen, Height 
eighty feet. It extends to Japan, where also a pecu- 
liar species, Populus Sieboldii (Miq.), exists. The 
aspen-wood is white and tender, and in use by coop- 
ers and joiners. 
Populus tremuloides, Michaux.—The North Ameri- 
can Aspen. Height fifty feet. It extends west to 
California, where a particular species, Pop. trichocar- 
pa, Torrey, occurs. All poplars might be planted, 
like all willows, inour gullies, to intercept forest-fires; 
also, generally on river-banks. 
Quercus Agilops, L.— South Europe. A tree of 
the size of the British Oak. The cups, known as 
Valonia, used for tanning and dyeing; the unripe 
acorns as Camata or Camatena, for the same purpose. 
The wood is capital for furniture. 
Quercus alba, L.—The White or Quebec Oak. A 
most valuable timber tree, one hundred feet high ; 
diameter of stem, seven feet. Wood in use by ship- 
builders, wheelwrights, coopers, and other artisans. 
Quercus annulata, Smith.—A large Oak of Nepal, 
which provides a very good timber. 
Quercus aquatica, Walter. — North America. 
Height of tree sixty feet; it furnishes a superior 
bark for tanning, also wood for ship-building. 
Quercus Cerris, L.—South Europe ; of the height of 
the English Oak ; in suitable localities of quick growth. 
