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| | Fern - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-18) |
 | | The last group includes most plants familiarly known as ferns. |
 | | The Marattiopsida are a primitive group of tropical ferns with a large, fleshy rhizome, and are now thought to be a sister taxon to the main group of ferns, the leptosporangiate ferns, which include the other three groups listed above. |
 | | Modern research indicates that the Osmundopsida diverged first from the common ancestor of the leptosporangiate ferns, followed by the Gleichenopsida. |
| www.eastcleveland.us /project/wikipedia/index.php/Fern (746 words) |
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