I got this at "Old Town Aquarium" in down town chicago. Have any idea what it could be? they sold it cheap and said it dies in our tanks we'll give you a deal on it.
defiantly Alternanthera reineckii. when grown in medium to lower light the plant is less red. most the red is on the underside of the leaf and green on top of the leaf. I have several tanks with this in it. One plant in lower light that will get red colors.