What do I have?

> From: Tomasz Nidecki <Tomasz.Nidecki at f78_n480.z2.fidonet.org>
> Does anyone know a plant which looks like the following:
> - - leaves set like in a Hygrophila
> - - growns well both submersively and emersively
> - - emersive form has a "hairy" stem
> - - leaves look just like oak leaves (such shape), light
> green, like other hygrophilas, but there is no leaf base
> (sorry for my limited English - how do you call the part
> between the actual leaf and the stem?) meaning the leaf is
> set on the stem directly, with part of the leaf even growing
> around the stem and joined with the leaf on the oposite side

Hmmm, I would guess Shinnersia rivularis ("Mexican Oak Leaf").