Ferns and Fern Allies of Wisconsin
Key

1. Megaspores with numerous spines on the surface.   Isoetes echinospora 1. Megaspores with curving ridges on the surface.   Isoetes lacustris

Key to ferns (start) Glossary of terms Introduction to ferns List of all Pteridophytes Contact the author Acknowledgments UW-Green Bay Herbarium homepage