Ferns of West Virginia

According to the site www.gardenweb.com "there are 50 different species of ferns in West Virginia". "The most widespread fern in WV is the Christmas fern (polystichum acrostichoides)."
The Connecticut Botanical Society has an informative site at www.ct-botanical-society.org
I am including a picture of this recognizable fern, that I viewed at the above site.