The Ferns and Fern Allies of Pennsylvania Holstein and perhaps forgo traditional approaches

and perhaps forgo traditional approaches

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The Ferns and Fern Allies of Pennsylvania Holstein and perhaps forgo traditional approachesThree hundred million years ago, ferns dominated the earths 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