Mistatee wrote:

I have a Hosta in my pond, been coming back for years now.
May only be certain varieties that like being permanently saturated.

I understand that many plants don't mind having *some* of their roots
underwater, provided the water level does not change. Something about
two types of roots, one needs more oxygen than is normally in water.

This'd be something to experiment with as I really doubt anyone has
put together a list.