Lotus have long thick stems :?
I like Apons, I really do but I have the worst luck with them. They do really well for me at first, then they go into their dormancy period and the bulb either rots before I can get to it or I get to it, but in a coffee can or some such with just enough sand or sphagnum moss and then I replant it months later and it starts, but pathetically then dies or the bulb just goes straight to the rotting.There are many in the Aponogeton genus that may fit the bill..