Large quantities are cut in the Maritime Provinces of Canada to be made into shingles. Grows sixty feet high and two feet or more in diameter. Arbor vitæ means tree of life, and as the bark and young twigs were at one time used medicinally, that may have been the origin of the name.
Wood is light, soft, coarse-grained, but, like the cedars, durable. Used for ties, posts, and shingles.
[LVI]
BROAD-LEAVED TREES
The broad-leaved trees are more numerous as to varieties than the evergreens, and from the standpoint of leaf forms may be divided into three groups:
1. Trees bearing simple leaves.
2. Trees bearing compound leaves.
3. Trees bearing doubly compound leaves.
The first group is the largest, including as it does such large families as the maples, oaks, willows, poplars.