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Northern Prairie Wildlife Research Center

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Aquatic and Wetland Vascular Plants of the Northern Great Plains

Dryopteris Adans. -- Shield fern

Rather large ferns of moist to wet, wooded habitats; rhizomes stout, scaly. Fronds alike or somewhat dimorphic, the sterile ones sometimes persisting over winter, glabrous, the blades pinnate-pinnatifid to tripinnate, ultimate segments commonly toothed or lobed; veins free, simple to once or twice dichotomous; petioles shorter than the blades, stramineous, bearing membranous scales. Sori round, occurring at regular intervals on the backs of the ultimate segments; indusium reniform, attached at its center in the middle of the sorus.

Lead Characteristic Go To
1 Blades bipinnate-pinnatifid to nearly tripinnate D. carthusiana
1 Blades pinnate-pinnatifid to nearly bipinnate D. cristata

4. Polypodiaceae, the Polypody Family
3. Dryopteris Adans. -- Shield fern
1. Dryopteris carthusiana (Vill.) H. P. Fuchs -- Spinulose woodfern
2. Dryopteris cristata (L.) A. Gray -- Crested fern

Return to Family -- Polypodiaceae - The Polypody Family
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