Part 17 (2/2)

The leaf is netted somewhat like that of the elm. The acorn is usually not more than half an inch in length.

ROCKY MOUNTAIN OAK (_Quercus undulata_) bears acorns which may be eaten like chestnuts, and not much more may be said for the tree in the way of usefulness to man, though it is the salvation of some of the small mammals of the bleak Texas and New Mexico hills where there is little to eat and few places for concealment from hawks and other enemies. The tree is also called scrub oak and s.h.i.+n oak. It grows in Colorado, New Mexico, western Texas, Arizona, Nevada, and Utah. At its best it rarely exceeds thirty feet high and a foot in diameter, and it often forms a jungle of shrubs through which the traveler must wade waist deep or go miles out of his way to pa.s.s round it. Its leaf is one of the smallest of the oaks, and is notched much like the chestnut leaf.

ALVORD OAK (_Quercus alvordiana_) is little known and will probably never be of much importance. It grows in the region of Tehachapi mountains, the northern border of the Mojave desert, in California, and was named for William Alvord of that state. The leaf is toothed, and the acorn smooth. No record has been found of any use of the wood, and when Sudworth compiled his book, ”Forest Trees of the Pacific Slope,” he was unable to procure enough leaves, flowers, and fruit to enable him to give a botanical description. It may therefore be regarded as one of the scarcest oaks in the United States, which fact gives it a certain interest.

SADLER OAK (_Quercus sadleriana_) is one of the minor oaks of the Pacific coast, and is popularly and properly called scrub oak by those who encounter it on high, dry slopes of northern California and southern Oregon mountains, from 4,000 to 9,000 feet above the sea. It forms dense thickets, and pa.s.ses for an evergreen. Its leaves remain on the branches only thirteen months. The leaves are toothed like those of chestnut. The acorns are matured in one season. The name Sadler oak was given it in honor of a Scottish botanist. Trees are too scarce and too small to have much value, except as a ground cover.

BREWER OAK (_Quercus breweri_) grows on the west slope of the Sierra Nevada mountains in California, from Kaweah river northward to Trinity mountains. It is often little more than a shrub, and its usefulness to man lies less in the quant.i.ty of wood it produces than in the protection the dense thickets, with their network of roots, afford steep hillsides. Gullying in time of heavy rain cannot take place where this oak's matted ma.s.ses of roots bind the soil. Sprouts rise freely from the roots, and thickets are reproduced in that way rather than from acorns, although in certain years crops of acorns are bountiful. The trunks are too small to make any kind of lumber, but are capable of supplying considerable quant.i.ties of fuel.

[Ill.u.s.tration]

POST OAK

[Ill.u.s.tration: POST OAK]

POST OAK

(_Quercus Minor_)

Post oak is the most common name for this tree but various sections of its range have given it their own names which probably have local significance. The following names are in use in the localities denoted: post oak in the eastern and Gulf states, Connecticut to Texas, and in Arkansas and West Virginia; box white oak in Rhode Island; iron oak in Delaware, Mississippi and Nebraska; chene etoile in Quebec; overcup oak in Florida; white oak in Kentucky and Indiana; box oak and brash oak in Maryland.

Toward the northern portion of the range of this tree it is small, and in early times it was little used except for fence posts. Its durability fitted it for that use, and it is said the common name was due to that circ.u.mstance. The name iron oak was used by s.h.i.+pbuilders who sometimes bought small knees made of this wood. Baltimore oak was an early name which is not now in use. It was generally applied to white oak, but it included some post oak s.h.i.+pped from the Chesapeake bay region.

Post oak is botanically and commercially a white oak and is seldom distinguished from the true white oak, _Quercus alba_, in commerce. It is seen at its best in the uplands of the Mississippi basin and in the Gulf states west of the Mississippi, where it attains a considerable size. In the northeastern states and in Florida it is small, becoming shrubby in some localities, and more or less of local growth. Limestone uplands or dry, sandy or gravelly soils seem to offer the best conditions for its existence, where it grows in company with black jack, red and white oak, sa.s.safras, dogwood, gums, and red cedar.

The range of growth of post oak extends from New Brunswick south through the Atlantic states into Florida; west through the Gulf states and throughout the Mississippi river system, growing west brokenly to Montana. It is the common oak of central Texas but in the North it is rather scarce, becoming more plentiful in the lower Appalachians.

The broad, dense, round-topped crown of the post oak with its peculiar foliage make it very noticeable in the woods, even to the casual observer. Its dark green looks almost black at a distance. The tree has an average height of sixty or eighty feet and is about two feet in diameter, but in exceptional cases it reaches one hundred feet in height and has a diameter of three feet. It has a moderately thick, dark brown bark with a reddish tinge and deep fissures, the broad ridges being covered with thin scales. On the branches it becomes much thinner, and lighter in color, the branchlets being unfissured and glabrous in the second year, although fuzzy at first. They are rather heavy and rounded and terminate in short round buds with conspicuous scales. A noticeable feature of the tree is the peculiar branching. The limbs are heavy and crooked, separating often, with wide angles, forming knees which when big enough, have a commercial value.

When the tree is in foliage the tufted appearance of the leaves grouped on the ends of the twigs gives it a distinctive look. They bear some resemblance to a star, and for that reason some botanists have named the species _stellata_. The leaves are five or seven inches long usually, but in some cases, especially on young specimens, they are ten or more inches long. They are dark, s.h.i.+ny-green and on a short petiole, the veins and midrib being heavy and conspicuous. The identification of these leaves is easy as they are heavy in texture, are bilaterally developed with a large, obtuse lobe on each side about in the middle, giving them a maltese cross effect. They are very persistent, staying on the tree until the new leaves push them off in the spring.

The form of post oak is not ideal from the lumberman's viewpoint. The tree does not prune itself well. Straggling limbs adhere to the trunk and prevent the clean bole which often makes white oak so attractive.

The wood weighs 52.14 pounds per cubic foot. The name iron oak referred to the weight as well as the strength of the wood. It is rather difficult to season, and is inclined to check badly. The medullary rays are broad and numerous, and checking is apt to develop along the rays.

The summerwood occupies about half of the annual ring, and is dense and dark colored. Large pores are abundant in the springwood, and smaller ones in the summerwood.

Formerly this tree was known in some sections as turkey oak, though the name is no longer heard, but is now applied to another oak in the South.

The acorns are small enough to be eaten by turkeys, and when those game birds were wild in the woods they frequented parts of the forests where post oaks grew, and hunters knew where to find them. The uses of post oak for building and manufacturing purposes are the same as for white oak as far as they go, but post oak is not so extensively employed.

The earliest railroads in America were built in the region where post oak of excellent quality grew, and it saw service from the first as crossties, and car and bridge timbers. It is still used for those purposes. Its other important uses are as furniture material, both as solid stock and veneer; interior finish and fixtures for offices, banks, and stores; musical instruments, including frames, braces, and veneers; baskets, crates, and s.h.i.+pping boxes; vehicles, particularly tongues, axles, and hounds of heavy wagons; flooring, stair work, bal.u.s.ters.

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