Atlantic Monthly, Vol. 8, No. 46, August, 1861 | Page 4

Pine woods provide this relief, and cause the tinted forest groups to stand out in greater prominence. In many districts where Pines were the original growth, they still constitute the larger sylvan assemblages, while the deciduous trees stand in scattered groups on the edge of the forest, and the contiguous plain. The verdurous Pine wood forms a picturesque groundwork to set off the various groups in front of it; and the effect of a scarlet Oak or Tupelo rising like a spire of flame in the midst of verdure is far more striking than if it stood where it was unaffected by contrast.
The cause of the superior tinting of the American forest, compared with that of Europe, has never been satisfactorily explained, though it seems to be somewhat inexplicably connected with the brightness of the American climate. It is a subject that has not engaged the attention of scientific travellers, who seem to have regarded it as worthy only of the describer of scenery. It may, however, deserve more attention as a scientific fact than has been generally supposed,--particularly as one of the phenomena that perhaps distinguish the productions of the eastern from those of the western coasts of the two grand divisions of the earth. I have observed that the Smoke-tree, which is a Sumach from China, and the Cydonia Japonica, are as brightly colored in autumn as any of our indigenous shrubs; while the Silver-Maple, which, though indigenous in the Western States, probably originated on the western coast of America, shows none of the fine tinting so remarkable in the other American Maples. These facts have led me to conjecture that this superior tinting of the autumnal foliage may be peculiar to the eastern coasts both of the Old and the New Continent, in the northern hemisphere. May not this phenomenon bear some relation to the colder winters and the hotter summers of the eastern compared with the western coasts? I offer this suggestion as a query, not as a theory, and with the hope that it may induce travellers to make some particular observations in reference to it.
The indigenous trees of America, or rather of the Atlantic side of this continent, are remarkable not only for their superior autumnal hues, but also for the shorter period during which the foliage remains on the trees and retains its verdure. Our fruit-trees, which are all exotics, retain their foliage long after our forest-trees are leafless; and if we visit an arboretum in the latter part of October, we may select the American from the foreign species, by observing that the latter are still green, while the others are either entirely denuded, or in that colored array which immediately precedes the fall of the leaf. The exotics may likewise be distinguished in the spring by their precocity,--their leaves being out a week or ten days earlier than the leaves of our trees. Hence, if we take both the spring and autumn into the account, the foreign, or rather the European species, show a period of verdure of three or four weeks' greater duration than the American species. Many of the former, like the Weeping Willow, do not lose their verdure, nor shed their leaves, until the first wintry blasts of November freeze them upon their branches and roll them into a crisp.
In a natural forest there is a very small proportion of perfectly formed trees; and these occur only in such places as permit some individuals to stand isolated from the rest, and to spread out their branches to their full extent. When we walk in a forest, we observe several conditions which are favorable to this full expansion of their forms. On the borders of a pond or morass, or of an extensive quarry, the trees extend their branches into the opening, but, as they are cramped on the opposite side, they are only half developed. But this expansion takes place on the side that is exposed to view: hence the incomparable beauty of a wood on the borders of a pond, or on the banks of a river, as viewed from the water; also of a wood on the outside of an islet in a lake or river.
Fissures or cavities sometimes occur in a large rock, allowing a solitary tree that has become rooted there to attain its full proportions. It is in such places, and on sudden eminences that rise above the forest-level, on a precipice, for example, that overlooks the surrounding wood, that the forest shows individual trees possessing the characters of standards, like those we see by the roadsides and in the open field. We must conclude, therefore, that a primitive forest must contain but a very small proportion of perfect trees: these are, for the most part, the occupants of land cleared by cultivation,