APPENDIX.
I. TREES.
The prevailing trees (I speak only of what I saw) on the east and west branches of the Penobscot and on the upper part of the Allegash were the fir, spruce (both black and white), and arbor-vitæ, or "cedar." The fir has the darkest foliage, and, together with the spruce, makes a very dense "black growth," especially on the upper parts of the rivers. A dealer in lumber with whom I talked called the former a weed, and it is commonly regarded as fit neither for timber nor fuel. But it is more sought after as an ornamental tree than any other evergreen of these woods except the arbor-vitæ. The black spruce is much more common than the white. Both are tall and slender trees. The arbor-vitæ, which is of a more cheerful hue, with its light-green fans, is also tall and slender, though sometimes two feet in diameter. It often fills the swamps.
Mingled with the former, and also here and there forming extensive and more open woods by themselves, indicating, it is said, a better soil, were canoe and yellow birches (the former was always at hand for kindling a fire,—we saw no small white-birches in that wilderness), and sugar and red maples.
The Aspen (Populus tremuloides) was very common on burnt grounds. We saw many straggling white pines, commonly unsound trees, which had therefore been skipped by the choppers; these were the largest trees we saw; and we occasionally passed a small wood in which this was the prevailing tree; but I did not notice nearly so many of these trees as I can see in a single walk in Concord. The speckled or hoary alder (Alnus incana) abounds everywhere along the muddy banks of rivers and lakes, and in swamps. Hemlock could commonly be found for tea, but was nowhere abun-
