Gymnosperms - Research Article from Macmillan Science Library: Plant Sciences

This encyclopedia article consists of approximately 8 pages of information about Gymnosperms.
This section contains 2,187 words
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Coniferophyta

The Coniferophyta, or conifers, are the most abundant group of living gymnosperms and the first of the living gymnosperm groups to appear in the fossil record. They have been important components of Earth's vegetation for almost three hundred million years. The oldest (bristlecone pine), the tallest (coast redwood), and the biggest (giant sequoia) organisms on the planet today are conifers. Most conifers are large trees that make abundant wood, have small evergreen leaves, and produce their seeds within woody cones.

Although most conifers fit that standard description, there are numerous exceptions. First, not all conifers are evergreen. A few types, such as the larch, are deciduous, losing all their leaves each fall and growing new leaves in the spring. Even the leaves of the evergreen type are not immortal; it is just that the senescence (aging and death) of leaves occurs individually rather than all at once. Second...

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This section contains 2,187 words
(approx. 8 pages at 300 words per page)
Buy the Gymnosperms Encyclopedia Article
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Macmillan Science Library: Plant Sciences
Gymnosperms from Macmillan Science Library: Plant Sciences. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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