The lodgepole pine has been called a fire tree, and the name is not
inappropriate. It profits by severe burning, as some other trees of the
United States do, such as paper birch and bird cherry. The sealed cones
are opened by fire, which softens the resin, and the seeds are liberated
after the fire has passed, and wing their flight wherever the wind
carries them. The passing fire may be severe enough to kill the parent
tree without destroying or bringing down the cones. The seeds soon fall
on the bared mineral soil, where they germinate by thousands. More than
one hundred thousand small seedling trees may occupy a single acre. Most
of them are ultimately crowded to death, but a thick stand results. Most
lodgepole pine forests occupy old burns. The tree is one of the slowest
of growers. It never reaches large size--possibly three feet is the
limit. It is very tall and slender. A hundred years will scarcely
produce a sawlog of the smallest size.
The range of this tree covers a million square miles from Alaska to New
Mexico, and to the Pacific coast. Its characters vary in different parts
of its range. A scrub form was once thought to be a different species,
and was called shore pine.
The wood is of about the same weight as eastern white pine. It is light
in color, rather weak, and brittle, annual rings very narrow, summerwood
small in amount, resin passages few and small; medullary rays numerous,
broad, and prominent. The wood is characterized by numerous small knots.
It is not durable in contact with the ground, but it readily receives
preservative treatment. In height it ranges from fifty to one hundred
feet.
The government’s estimate of the stand of lodgepole pine in the United
States in 1909 placed it at 90,000,000,000 feet. That makes it seventh
in quantity among the timber trees of this country, those above it being
Douglas fir, the southern yellow pines (considered as one), western
yellow pine, redwood, western hemlock, and the red cedar of Washington,
Oregon, and Idaho.
Lodgepole pine has been long and widely used as a ranch timber in the
Far West, serving for poles and rails in fences, for sheds, barns,
corrals, pens, and small bridges. Where it could be had at all, it was
generally plentiful. Stock ranges high among the mountains frequently
depend almost solely upon lodgepole pine for necessary timber.
Mine operators find it a valuable resource. As props it is cheap,
substantial, and convenient in many parts of Colorado, New Mexico,
Wyoming, and Montana. A large proportion of this timber which is cut for
mining purposes has been standing dead from fire injury many years, and
is thoroughly seasoned and very light. It is in excellent condition for
receiving preservative treatment.
Public-domain text, read in full here on John Shaqi.
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