The Swamp Oak bears resemblance in many points to the White Oak; but it has less breadth, and abounds in strangling branches growing from the trunk just below the junction of the principal boughs. This gnarled and contorted growth is one of the picturesque appendages of the Swamp Oak, distinguishing it from all the other species, and rendering it an important feature in a wild and rugged landscape. This cluster does not, like the vinery of the elm, clothe the whole extent of the bole, but resembles an inferior whorl of branches below the principal head. Above it, the tree forms rather a cylindrical head, and the principal branches are short compared with those of other oaks.
The leaves of this tree bear some resemblance to those of the chestnut. They are almost entire, and bluntly serrated, rather than scalloped. They are of a slightly reddish green when mature, and turn to a leather-color in the autumn. Trees of this species are at the present time very prominent objects of the landscape in Eastern Massachusetts, where they are very frequent in half-cleared lands that lie only a little above the sea level and contain considerable clay. The Swamp Oak in some favorable soils attains great size; but in New England, though an interesting object in scenery, it is only a tree of second magnitude. The Chestnut Oak is not uncommon around New Bedford and many other parts of New England, but it is not an inhabitant of the woods near Boston.
THE RED OAK.
The Red Oak is the largest of the genus belonging to American woods, and the least useful for any purposes except those of shade and ornament. It is very regular and well proportioned, having a remarkably wide spread, and branches comparatively but little contorted. It is taller than the white oak, and does not branch so near the ground; but it possesses in a high degree that expression of majesty for which the oak is celebrated. The scarcity of trees of this species by our roadsides is remarkable, since they display the union of so many of the qualities which are desirable in a shade-tree. The Red Oak thrives well on a poor soil, and grows with great rapidity; its foliage is very beautiful, and deeply cleft, like that of the scarlet oak, though larger, and its reddish-purple tints in the autumn are hardly inferior. Perhaps the scarcity of oaks in general by the wayside is owing to the peculiar shape of their roots, which extend to a great depth in the soil, and render the trees very difficult to be transplanted. Hence the wayside oaks are such as have come up spontaneously in the places they occupy, and were there when the road was laid out.
THE SCARLET OAK.
The Scarlet Oak in many points resembles the one I have just described. Like the red oak, its branches are regular and comparatively free from contortions, and the quality of its timber is inferior. The leaves are distinguished from those of all other species by their deep sinuosities, being almost like the skeletons of a leaf, the lobes terminating in narrow teeth with long sharp points. This tree is greatly admired in landscape, and on large estates it is constantly preserved as an ornament. Its chief attraction is the bright color of its autumn foliage; but the fine gloss and deep verdure of its leaves in summer are very beautiful. It turns in autumn to a dark crimson, not a scarlet, as the name would imply. It could not justly be named scarlet, save when it is brightened by sunshine, which adds to all crimson foliage a little gold. But as the oaks are very late in assuming their autumnal tints, and are not in their brightest condition until the maples have faded, the Scarlet Oak, when it has attained its full splendor, is the most beautiful tree of the forest.
There are certain trees which we do not highly value in landscape as single individuals, while they attract our attention in assemblages. Our hills, for example, in some parts of the country, are nearly covered with a growth of Scrub Oak, or Bear Oak. They are not ornamental as single trees, and they are prone to usurp the whole ground, excluding that charming variety of shrubs which constitutes the beauty of our half-wooded hills.
THE BLACK OAK.
It is not my intention to enumerate all the species of this genus; but I must give a passing notice to the Black Oak, because it is a common and very large tree in favorable situations. It has been named Black Oak on account of the very dark color of its outer bark; and Yellow Oak,—a name quite as common as the other,—from the yellow color of its inner bark, which produces the quercitron used by dyers. It may also have been so called from the yellowish leather-color of its leaves in the autumn, resembling the color of a dry oak-leaf. Many large trees of this species are found in the New England States. In Kentucky it is named Black Jack, and constitutes the principal timber of those extensive tracts called Oak Barrens.