- Fronds usually 2 to 4 levels of division (pinnation)
- Frond stalks with scales
- Sori along frond veins
- Indusia present
- Polypodiopsida (ferns)
- A group of early vascular plants that produce spores (no flowers or seeds)
- Perennial ferns from rhizomes (horizontal underground stems)
- Fronds are divided into leaflets (compound) with 1 to 4 levels of division (pinnation)
- Frond stalks have scales
- Sori (sacs containing reproductive cells/spores) located on the underside of the frond, along the frond veins; each round sorus covered by an indusium (a membrane covering sori until mature)
- More than 1,600 species worldwide
- Scientific name from the included genus Dryopteris, from the Greek drys, “oak,” and pteris, “fern,” referring to the plants’ habitat
- Represented by 2 species at Edgewood
American Fern Society. About Ferns.
U.S. Forest Service, United States Department of Agriculture. What Are Ferns?.