I've had this plant for a while waiting for it to flower to help with getting it IDed. So far no flowers, and no ID. It's an aroid that likes sitting in water. The roots have gone through the bottom of the pot and are running through the water. Any help appreciated, thanks.

Have been looking around and the closest I'm able to come up with is Lagenandra sp. Of those L. lancifolia seems to be the best match. Thought L. thwaitesii might be a possibility but it seems its leaves mostly have undulating margins. Another candidate could be L. praetermissa.