I think I found it online...

is this it???

http://www.sandmountainherbs.com/watercress.html

I thought watercress was a different plant???
I'm very confused now.

Sam wrote:
While I was down at HomeDepot, I asked several pelple from the garden
department for "nasturtium." They looked at me as if I was from Mars!
One of them actually pointed me to the vegetable section!!! I was
wondering if it goes by some "common" name that the HD people would
recognize!

PS if anyone has a pic (or link with pic) handy, it would go a long
way! Because then, I can just show them the pick and say: this is what
I'm looking for! ;-)

Thanks!
Sam