Need info on Echinodorus puriensis

[Matt]

Anyone know this plant? Tried to findout about this plant, but nothing came up on Google. It is sopposed to be a "Brown leaf" sword plant that only gets 3-4" tall. Sounds like it would be a great foreground plant, just can't get and info on it.

Here's the link if you want to see a picutre of it
http://www.floridadriftwood.com/product.asp?3=185

Thanks for any help.