jumpfreak: its Najas guadalupensis, also called Najas grass. ( I always think of it as Ninja Grass lol)
Sounds good to me Lotus. Looking for more riccia now too, so if you want to get rid of it I'll take it as well. The riccia that you sent with the shrimp got took over by hair algae shortly after we moved and I had to scrap all of it. I'm setting up a few tanks just for the cherries so it's going to be left floating anyway.