Woodsia obtusa (Spreng.) Torr.
Blunt-lobed cliff fern
|Kingdom||Plantae||Plants, but not fungi, lichens, or algae|
|Subkingdom||Tracheobionta||Vascular plants—plants with a “circulatory system” for delivering water and nutrients|
|Class||Filicopsida||“Leptosporangiate” (has to do with how their spores form) ferns—includes most ferns|
|Family||Dryopteridaceae||Wood ferns (about 70% of the ferns)|
|Genus||Woodsia||For Joseph Woods (1776-1864), English architect and botanical author|
|Species||obtusa||“Blunt,” for the blunt lobes and pinnules|
About plant names...
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.
The Hardy Fern Library
The Vanderbilt University Bioimages web site
The Missouri Botanical Garden
The New England Wildflower Society’s GoBotany site
Woodsia obtusa description by Thomas H. Kent, last updated 25 May 2020.
© FloraFinder.org. All rights reserved.
5/22/2010 · Garden in the Woods, Framingham, Massachusetts
≈ 17 × 12" (44 × 29 cm)
Range: Zones 4-9:
About this map...