Yet another plant id

[kingearwig]

Here's another one I found here in North West Indiana. Any idea?

I was lucky enough to find 2 of them here is the other.

Thanks!

 

[Inka4040]

watercress?

 

[kingearwig]

hmm... anyone ever tried growing that in an aquarium before? I found this right in the middle of a stream. in about 5-6 inches of water. It seems like it is growing.

 

[kingearwig]

no one has any input on growing watercress submerged?