The Common Grape Fern (Botrychium dissectum) is easily identified by noting how the leaf stem is separated from the fertile stem at ground level.
This photo was clicked in the Country Club woods in Danville, Virginia, back in 1969.
Also see this illustration in larger format, and the article “Ferns of Pittsylvania County, Virginia.”
Copyright © 2007 William T. Hathaway.