It's not very clear to me either. Here's some pics of Musa nagesium. I think Musa nagesium has alot of yellow, and wax. Yellow midrib, yellow petiole, and yellow flower.
M. nagesium pics from Chinese border.
http://tag.inibap.org/files/Wild_spe...usa_nagensium/
This will probably only add to the confusion. Now different pics of Musa nagesium from plant grown in Kerala India, but I don't think it is correct(but sure would like to have one of these anyways)-
http://www.users.globalnet.co.uk/~dr...siumimages.htm
Now more pics from Burmese/India border from Trebrown seed suppliers.-
http://www.trebrown.com/forum/viewtopic.php?t=302
Looking back on your plant, I'm not sure anymore.
http://gardenbreizh.org/photos/niceben/photo-57766.html