This is the most recent picture of my aquascape, although it is four months old and things have changed considerably since it was taken. I've been working on improving my aquascaping since this was taken and will be shooting some new pictures of my tank as the plants grow in.
Tex Gal, I think the plant you're looking at is Ranunculus inundatus sometimes referred to as Ranunculus papulentus. It is very much like Hydrocotyle verticellata in its growth habits but is more robust and invasive. I find it pretty in large, thick bunches.