One of my girlfriends clients gave her a leaf from a plant he has a while back. The guy grows some stuff with medicinal qualities like aloe, etc. and this is believed to be one of those. Anyway I stuck it in some water and have a few small plants months down the line that look like this:
The mature leaf that he gave her was roughly the size of my hand if I remember correctly and looked just like the leaves pictured but with more pronounced ridging.