bought it from a reputable large uk LFS chain along with some wysteria and didnt even think about it not being an aquatic plant. However some of the older leaves appear to be breaking down slightly, although there are roots appearing from between most of the new leaf 'shoots' as I would expect in an aquatic plant rather than a marginal.
Cheers for any id's you can give, sorry about the picture quality!
Cheers for any id's you can give, sorry about the picture quality!