to me it looks like the newest leaf pushing out of the pseudostem
the newest leaf is referred to as a cigar leaf when it is tightly coiled still like the one shown
the variety has closed petioles
ice cream bananas are known to be mislabelled due to mistakes made in tissue culturing and mass distribution before confirming the variety
you may have the variety namwah which was sold as icecream by agristarts
apparently it is very good tasting... better than icecream
and fairly cold hardy, more so than icecream
check out bananas.org for more info
http://www.bananas.org/f12/petioles-16564.html