Woodsia obtusa (Spreng.) Torr.
Blunt-lobed Cliff Fern
Blunt-lobed cliff fern is a North American native. They tolerate temperatures as low as –35°C.
Identification: Leaf stalks are scaly, with hairs. Fronds are lacy, 24" (60 cm) × 3" (8 cm), bipinnate. The sterile fronds are evergreen, while the fertile fronds are not. Fronds are light green to gray-green. Sori, the structures that contain the fern’s spores, are located on leaf undersides. They form a regular array of dots that are circular or kidney-shaped.
Woodsia obtusa at Illinois Wildflowers
Woodsia obtusa on the Hardy Fern Library
Woodsia obtusa at the Vanderbilt University Bioimages web site
Woodsia obtusa on Wikimedia Commons
Woodsia obtusa at the Missouri Botanical Garden
Woodsia obtusa on Discover Life
Woodsia obtusa on the New England Wildflower Society’s GoBotany site
Woodsia obtusa on Erv Evans' site at the North Carolina State University College of Agriculture and Life Sciences
Woodsia obtusa description by Thomas H. Kent, last updated 12 Oct 2018.
Range: Zones 4-9: