I took a few extra pictures of the Colocasia fallax 'Silver Dollar' taro when I yanked it out.
It has such attractive leaves. You can see to the left of the leaf a couple of spathes (flowers). The spathe on this plant is actually pretty dull and not much to look at.
Thanks again everybody. Yes that is a radicans sword, Echinodorus cordifolius. The tank doesn't look like much now. I am going to replant it this weekend. I will yank the radicans out of there too and the chameleon plant.