I highly recopmend the Crypt species. I have some of these in my tanks, can't remember which variety, there are several. I got mine from a local (70 miles is "local" for me! :lol: ) pet store. Black jungle recently added them to their website. They are a great plant, will grow underwater, on land, and just about everywhere inbetween. They have a great deep green color, stay a compact 5-6" tall, (from what I've seen) and seem to live and grow with very little light, but strong lighting don't bother them either.
Have fun!