[Derek-M]

aponogeton at the back and the foreground cabomba

Have a look here

http://www.tropica.com/default.asp

 

[Derek-M]

Could be Aponogeton crispus, although I can't tell if there is a "stem" before the leaf or not. If there isn't a stem then maybe a fern of some kind.

If you look at the bottom left next to the right side of the ornament you can see a stem .