Yep, very same. Cabomba, hornwort and there's another ~ hydrilla? Name escapes me at the moment. I have all three in my ponds and they're the very same as the ones in everyone's aquariums.
Ruki's also right about some terrestrial plants also being used as pond plants. Pennywort and Lobelia cardinalis are two more. I've seen some pics of the emersed form of some hygros and they sure look familiar to me, too (I'm a life-long terrestrial gardener).
~ Linda ~
How many watts do I need to make my swimming pool a high light tank?