Heres the best pic of the petiole of the pics.
It is the top left one, and the other Musa sp. Nov is below it. Then the top right is Musa cheesemanii, and below it is M.nagaesium. I'm thinking that M.nagesium and M.cheesemanii are really closely related, and could turn out to be the same, or at least subspecies.
http://img.photobucket.com/albums/v3...2cheesnaga.jpg