i have been basing my guesses on google image searches which relies on the images to be labelled correctly which might not be the case
this seedling is the one i thought looked like youres
at one point i was thinking it could be musa velutina markkuana
because the cigar leaf was quite white on the underside as it unfurled (similar to the first image which comes up in a search)
that trait has changed as it got bigger, now the underside is red
these are all just guesses though i really have no idea
