Ferns and Fern Allies of Wisconsin
Key

1. Stems "jointed", with or without whorled branches at the nodes.   Equisetum
1. Stems not conspicuously jointed, branches if present not whorled.
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Key to ferns
(start)
Glossary of terms
Introduction to ferns
List of all Pteridophytes

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Acknowledgments
UW-Green Bay Herbarium homepage