OK...I'm feeling smart now. I believe that you have a Greek motif called an "Anthemion". I figured that your motif looked to me a lot like a palm leaf...and, it does!
There are some images of the Greek Anthemion at the link below...http://etc.usf.edu/clipart/galleries/Arts/greek_ornament.htm
The Wikipedia has a brief entry under "Palmette" here...http://en.wikipedia.org/wiki/Palmette
And, if you want to shell out big bucks for matching wallpaper, check out Bradbury's Neo-Grec roomset...http://www.bradbury.com/victorian/ng_cream.html
I'm going to go ahead and do my victory dance. Hope this helps a bit.