Robert W. Freckmann Herbarium
University of Wisconsin - Stevens Point

Vascular Plants

Plants of Wisconsin

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  Dryopteris expansa (C.Presl) Fraser-Jenk. & Jermy image
Photographer: Sue R. Crispin           

Emmet J. Judziewicz
Family Dryopteridaceae
Dryopteris expansa (C.Presl) Fraser-Jenk. & Jermy
northern wood fern, spreading wood fern
Dryopteris: from 2 Greek words drys, "oak," and pteris, "fern," possibly referring to the plant's habitat
expansa: expanded
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Special Concern
Plant: perennial fern
(Glossary)

More Information Natural Communities Herbarium Specimens
All Dryopteris list Google- Images or Text

Flora of North America (off site)
Synonyms 
Aspidium spinulosum (O.F.Müll.) Sw. var. americanum Fisch. ex Kunze
Dryopteris assimilis S.Walker
Dryopteris dilatata auct. non (Hoffm.) A.Gray
Dryopteris dilatata (Hoffm.) A.Gray subsp. americana (Fisch. ex Kunze) Hultén
Dryopteris spinulosa (O.F.Müll.) Watt var. americana (Fisch. ex Kunze) Fernald
Dryopteris spinulosa (O.F.Müll.) Watt var. dilatata auct. non (Hoffm.) Underw.
Nephrodium expansum C.Presl
Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. americana (Fisch. ex Kunze) Weath.

Vascular Plants

Plants of Wisconsin

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