Thanks again everybody. I have a few additional observations for one of the plants in there,
Bacopa caroliniana. This one is not so full like the rest of the stems in there, but I had struggled to get it to grow and now it is finally responding. I think that the important factor for this one might have been the mineralized topsoil that I added to the planter cup.
This is a handsome plant that grows as floating mats on the edges of streams and lakes. These little sprouts grew from the bases of the older stems growing off to the right. I hope that this plant will grow more bushy and cover the trellis raft that I have floating in front.