It is in these relations, leaving their uses in economy and the arts untouched, that I would now speak of trees. I would consider them as they appear to the poet and the painter, as they are connected with scenery, and with the romance and mythology of Nature, and as serving the purposes of religion and virtue, of freedom and happiness, of poetry and science, as well as those of mere taste and economy. I am persuaded that trees are closely connected with the fate of nations, that they are the props of industry and civilization, and that in all countries from which the forests have disappeared the people have sunk into indolence and servitude.
Though we may not be close observers of Nature, we cannot fail to have remarked that there is an infinite variety in the forms of trees, as well as in their habits. By those who have observed them as landscape ornaments, trees have been classified according to their shape and manner of growth. They are round-headed or hemispherical, like the Oak and the Plane; pyramidal, like the Pine and the Fir; obeliscal, like the Arbor-Vitæ and Lombardy Poplar; drooping, like the White Elm and the Weeping Willow; and umbrella-shaped, like the Palm. These are the natural or normal varieties in the forms of trees. There are others which may be considered accidental: such are the tall and irregularly shaped trees which have been cramped by growing in a dense forest that does not permit the extension of their lateral branches; such also are the pollards which have been repeatedly cut down or dwarfed by the axe of the woodman.
Of the round-headed trees, that extend their branches more or less at wide angles from their trunk, the Oak is the most conspicuous and the most celebrated. To the mind of an American, however, the Oak is far less familiar than the Elm, as a way-side tree; but in England, where many
"a cottage-chimney smokes From betwixt two aged Oaks,"
this tree, which formerly received divine honors in that country, is now hardly less sacred in the eyes of the inhabitants, on account of their familiarity with its shelter and its shade, and their ideas of its usefulness to the human family. The history of the British Isles is closely interwoven with circumstances connected with the Oak, and the poetry of Great Britain has derived from it many a theme of inspiration.
The Oak is remarkable for the wide spread of its lower branches and its broad extent of shade,—for its suggestiveness of power, and consequent expression of grandeur. It is allied with the romance of early history; it is celebrated by its connection with the religion and religious rites of the Druids,—with the customs of the Romans, who formed of its green leaves the civic crown for their heroes, and who planted it to overshadow the temple of Jupiter; and many ancient superstitions give its name a peculiar significance to the poet and the antiquary. From its timber marine architecture has derived the most important aid, and it has thereby become associated with the grandeur of commerce and the exploits of a gallant navy, and is regarded as the emblem of naval prowess. The Oak, therefore, to the majority of the human race, is, beyond all other trees, fraught with romantic interest, and invested with classic and historical dignity.
The American continent contains a great many species of Oak in its indigenous forest. Of these the White Oak bears the most resemblance to the classical tree, in its general appearance, in the contorted growth of its branches, and in the edible quality of its fruit. But the Red Oak, the most northerly species, exceeds all others in size. No other attains so great a height, or spreads its branches so widely, or surpasses it in regularity of form. As we advance south, the White Oak is conspicuous until we arrive at North Carolina, where the forests and way-sides exhibit the beautiful Evergreen Oak, which, with its slender undivided leaves, the minute subdivisions of its branches, and its general comeliness of form, would be mistaken by a stranger for a Willow. A close inspection, however, would soon convince him that it has none of the fragility of the Willow. On the contrary, it is the most noted of all the genus for its hardness and durability, being the identical Live Oak which has supplied our navy with the most valuable of timber. At the South the Evergreen Oak is a common way-side tree, mingling its hues with the lighter green of the Cypress and the sombre verdure of the Magnolia.
The Oak exceeds all other trees, not only in actual strength, but also in that outward appearance by which this quality is manifested. This expression is due to the general horizontal spread of its principal boughs, the peculiar angularity of the unions of its small branches, the want of flexibility in its spray, and its great size when compared with its height, all manifesting its power to resist the wind and the storm. Hence it is regarded as the monarch of trees, surpassing all in those qualities that indicate nobleness and capacity. It is the emblem of strength, dignity, and grandeur: the severest hurricane cannot overthrow it, and, by destroying some of its branches, leaves it only with more wonderful proofs of its resistance. Like the rock that rises in mid-ocean, it becomes in its old age a just symbol of fortitude, parting with its limbs one by one, as they are broken by the gale or withered by decay; but still retaining its many-centuried existence, when, like an old patriarch, it has seen all its early companions removed.
Standard Oaks are comparatively rare in the New England States, and not many adorn our way-sides and inclosures, which are mostly shaded by Elms, Limes, Maples, and Ash-trees. The scarcity of Oaks in these places is attributable in some degree to the peculiar structure of their roots, which extend downwards to a great depth in the soil, causing them to be difficult of transplantation. It is owing in still greater measure to the value of Oak-wood for ship-timber,—especially as those full-grown trees which have sprung up by the road-sides, and the noble pasture Oaks, contain the greatest number of those joints which are in special demand for ship-building. Year after year, therefore, has witnessed the gradual disappearance of these venerable trees, which the public should have protected from the profane hands of the "timberer," by forcing him to procure his materials from the forest. The community needs to be taught that a standard tree of good size and well-developed proportions is of more value for its shade, and as an object in the landscape, than a whole acre of trees in the middle of a wood.
One of the most majestic trees in the American forest is the Chestnut, remarkable, like the Oak, for its broad extent of shade. In some parts of the country it is one of the most common standards in the field and pasture, having been left unmolested on account of the value of its fruit and the comparative inferiority of its timber. The foliage of this tree is dense and flowing, and peculiar in its arrangement. The leaves are clustered in stars of from five to seven, on short branches that grow from one of greater length. Hence, at a little distance, the whole mass of foliage seems to consist of tufts, each containing a tassel of long pointed leaves, drooping divergently from a common centre. The flowers come out from the centre of these leaves in the same manner, and by their silvery green lustre give a pleasing variety to the darker verdure of the whole mass. "This is the tree," says Gilpin, "which graces the landscapes of Salvator Rosa. In the mountains of Calabria, where Salvator painted, the Chestnut flourished. There he studied it in all its forms, breaking and disposing of it in a thousand beautiful shapes, as the exigencies of his composition required."