USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Aquatic and Wetland Vascular Plants of the Northern Great Plains

4. Polypodiaceae, the Polypody Family

3. Dryopteris Adans. -- Shield fern

2. Dryopteris cristata (L.) A. Gray -- Crested fern


Fronds somewhat dimorphic, clumped, the outer sterile fronds smaller than the inner fertile ones and persisting longer during winter, the fertile fronds 3-8 dm tall; blades pinnate-pinnatifid to nearly bipinnate, narrowly lanceolate, 2-6 dm long, 7-15 cm wide, acuminate, narrowed at the base; pinnae as in the preceding, except ovate-lanceolate to lanceolate, only once-pinnately lobed; pinnules toothed, mostly 4-15 mm long, 4-7 mm wide, usually spinulose. Jun--Sep. Occurring in the same habitats as the preceding; uncommon; e ND, nc NE; (Circumboreal, in N.Amer. s to VA, AR, NE and ID).
GIF- Distribution Map

Map key


Previous Species -- Dryopteris carthusiana (Vill.) H. P. Fuchs -- Spinulose woodfern
Return to Family -- Polypodiaceae - The Polypody Family
Next Species -- Matteuccia struthiopteris (L.) Todaro

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/plants/vascplnt/species/dryocris.htm
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:42:11 EST
Reston, VA [vaww54]