What type of plant is this?

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Skydrive is easy to use with my phone, only reason I use it. Can anyone tell me what kind of plant this is? I got it in a bundle of water wisteria from my friend. The undersides of the leaves are purple.

If no one can I'd from this photo, I will post another pic of it in a tank after its done soaking.

Hi CrazedAce,

It is a little hard to tell from the picture; a submerged shot of a single stem would be better that showed the leaves and how they come off of the stem but based upon you picture is looks like:

Najas guadalupensis - alias 'Guppy Grass'
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No, definitely not guppy grass as I have some of that as well, it reminds me more of ludwigia or anacharis. I will get that submerged pic tomorrow!

rotala sp green

Hi binbin9,

A Rotala species of some type was my second choice.

yeah definitely, notice how underneath the leaf has a slight pinkish hue. This is very indicative of a Rotala Rotundifolio even. With higher iron and lower NO3 it would probably exhibit a bit more of a pinkish hue

Here's a couple shots of it in different tanks
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