[tsunami]

I wouldn't be too surprised if it did turn out to keep the variegated mutation. Variegation is very common in many aquatic plants. Here are some other plants which have variegated forms:

Alternanthera reineckii
Anubias barteri v nana
Aponogeton undulatus
Bacopa caroliniana
Hygrophila difformis
Lindernia rotundifolia
Rotala macrandra

Come to think of it, I think I remember seeing some online pond stores selling the variegated version of Hydrocotyle sibthorpioides!

Carlos