Our young Southerners contemplated the tree with feelings of interest and curiosity. They saw that it was about sixty feet high, and somewhat more than a foot in diameter. Its leaves were nearly cordate, or heart-shaped, and of a very dark-green colour; but that which rendered it most conspicuous among the other trees of the forest was the shining white or silver-coloured bark that covered its trunk, and its numerous slender branches. This bark is only white externally. When you have cut through the epidermis you find it of a reddish tinge, very thick, and capable of being divided into several layers. The wood of the tree makes excellent fuel, and is also often used for articles of furniture. It has a close, shining grain, and is strong enough for ordinary implements; but if exposed to the weather will decay rapidly.
The “canoe-birch” is not the only species of these trees found in North America. The genus Betula (so called from the Celtic word batu, which means birch) has at least half-a-dozen other known representatives in these parts. There is the “white birch,” a worthless tree of some twenty feet in height, and less than six inches diameter. The bark of this species is useless, and its wood, which is soft and white, is unfit even for fuel. It grows, however, in the poorest soil. Next there is a species called the “cherry-birch,” so named from the resemblance of its bark to the common cherry-tree. It is also called “sweet birch,” because its young twigs, when crushed, give out a pleasant aromatic odour. Sometimes the name of “black birch,” is given to this species. It is a tree of fifty or sixty feet in height, and its wood is much used in cabinet-work, as it is close-grained, of a beautiful reddish colour, and susceptible of a high polish.
The information regarding the birches of America was given by Lucien to his brothers, not at that time, but shortly afterward, when the three were engaged in felling one of these trees. Just then other matters occupied them, and they had only glanced, first at the canoe-birch and then at the other tree which Norman had pointed out. The latter was of a different genus. It belonged to the order Coniferæ, or cone-bearing trees, as was evident from the cone-shaped fruits that hung upon its branches, as well as from its needle-like evergreen leaves.
The cone-bearing trees of America are divided by botanists into three great sub-orders—the Pines, the Cypresses and the Yews. Each of these includes several genera. By the “pine tribe” is meant all those trees known commonly by the names pine, spruce, fir, and larch: while the Cupressinæ, or cypress tribe, are the cypress proper, the cedars, the arbor-vitæ, and the junipers. The yew tribe has fewer genera or species; but the trees in America known as yews and hemlocks—of which there are several varieties—belong to it.
The pines cannot be termed trees of the tropics, yet do they grow in southern and warm countries. In the Carolinas, tar and turpentine, products of the pine, are two staple articles of exportation; and even under the equator itself, the high mountains are covered with pine-forests. But the pine is more especially the tree of a northern sylva. As you approach the Arctic circle, it becomes the characteristic tree. Then it appears in extensive forests, lending their picturesque shelter to the snowy desolation of the earth. One species of pine is the very last tree that disappears as the traveller, in approaching the pole, takes his leave of the limits of vegetation. This species is the “white spruce” the very one which, along with the birch-tree, had been pointed out by Norman to his companions.
It was a tree not over thirty or forty feet high, with a trunk of less than a foot in thickness, and of a brownish colour. Its leaves or “needles” were about an inch in length, very slender and acute, and of a bluish green tint. The cones upon it, which at that season were young were of a pale green. When ripe, however, they become rusty-brown, and are nearly two inches in length.
What use Norman would make of this tree in building his canoe, neither Basil nor François knew. Lucien only guessed at it. François asked the question, by saying that he supposed the “timbers” were to come out of it.
“No,” said Norman, “for that I want still another sort. If I can't find that sort, however, I can manage to do without it, but not so well.”
“What other sort?” demanded François.
“I want some cedar-wood,” replied the other.