Ferns and Fern Allies of Wisconsin

3. Plants producing 2 types of spores (male and female); leaves with tiny ligule at the base. The two common species have either flat or 4-angled strobili. The third species with round strobili is endangered in Wisconsin, grows only on a few sites near Lake Michigan where it may easily be mistaken for a moss, and is very unlikely to be encountered by any but knowledgeable botanists. Selaginella
3. Plants producing only one kind of spore; leaves without a ligule at the base. The strobili are round, or in four species they are lacking, with the sporangia located in the axils of otherwise normal leaves, on round stems. Lycopodiaceae

Key to ferns
Glossary of terms
Introduction to ferns
List of all Pteridophytes

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