I found an Article about invasive plants of Brazil..............
There are two species of Musa listed...........
One is
Musa ornata............and the other is
Musa rosacea...........
I also found few pictures of
Musa rosacea........from Salto Morato...........here in Brazil.........
Source :
https://conexaosul2010.wordpress.com...-salto-morato/
I was thinking that the first pictures identified as
Musa ornata could be
Musa rosacea.............???
The small Flag Leave is specially intresting............