In Utah it is known as white balsam, as silver fir in some parts of California, and as black gum in Utah.
The prevailing species are the common fir and the silver fir.
They had left the silver fir belt and were in the region of dwarfed mountain pines.
The silver fir is more exacting in the matter of climate than in that of soil.
Dr. M'Dougall traces the silver fir louse to the same parentage.
The fungi that kill the silver fir inevitably before it is three hundred years old touch no limb of the Big Tree with decay.
The next higher is the Fir Zone, made up almost exclusively of two species of silver fir.
Three main wood belts cover the flanks of the Sierra: the lower or main pine belt, the silver fir belt, and the upper pine belt.
The tree known in this country as the silver fir par excellence (Abies pectinata) is the loftiest European tree.
In many places on the south and east coasts the silver fir does not thrive.