The pines belong to the coniferous (结球果的) class of trees; that is, trees which bear cones. The pines may be told from the other coniferous trees by their leaves, which are in the form of needles two inches or more in length. These needles keep green throughout the entire year. This is characteristic of all coniferous trees, except the larch and cypress, which shed their leaves in winter.
The pines are widely distributed throughout the Northern Hemisphere, and include about 80 distinct species with over 600 varieties. The species enumerated here are especially common in the eastern part of the United States, growing either native in the forest or under cultivation in the parks. The pines form a very important class of timber trees and produce beautiful effects when planted in groups in the parks.
How to tell them from each other: The pine needles are arranged in clusters. Each species has a certain characteristic number of needles to the cluster and this fact gener
A. Pine trees are classified as coniferous.
B. Most pine trees remain green all year.
C. Pine trees are more useful for timber than for landscaping.
D. Pines are found throughout the Northern Hemisphere.
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