I took some pics today of both of my Musa formosana bananas. They don't really look much like Musa basjoo or M. itinerans, IMHO. The leaves are held at a very upright angle, like M. textilis.
The larger one:
Slightly smaller plant:
Pseudostem closeup. No petiole "wings" like M. basjoo has.
Leaf closeup. Notice how the emerging leaf is still tucked inside the most recently unfurled leaf. Not a characteristic of M. basjoo. Looks nothing like a Musa itinerans either, or M. balbisiana.
Any ideas?? I really am doubting whether or not this is the real Musa formosana.