The Ferns and Fern Allies of Pennsylvania

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The Ferns and Fern Allies of Pennsylvania - Lord, Thomas R
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Three hundred million years ago, ferns dominated the earth's surface, forming extensive marshes and forests with heights of over twenty-five meters. Today, ferns and their allies are still abundantly represented in the plant world, with somewhere between 10,000 and 12,000 species identified and recognized. These nonflowering, nonseeding, highly vascular plants make up a major and ancient division in the plant kingdom called Pteridophytes . In the state of Pennsylvania, one can find more than 100 species of these highly ...

The Ferns and Fern Allies of Pennsylvania 2008, Pinelands Press

ISBN-13: 9780964026797

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