Well I think graminifolia is the place to start! Thanks everyone!
And wow, that is one thick mat of graminifolia!
In books, most give precise instructions on it's care, but online, it seems that people keep it in all sorts of water conditions, lighting and even with fish and fertilizer! Some are high tech and others are very low tech. It seems to be a rather adaptable plant. Are their any details that must be attended to? So far, I've seen very little consistency.