Re: The cold hardy list
There is a banana with a similar growth habit to M. velutina. It's fruit remains green on maturity and splits open like M. velutina. It is named Musa hirta. I don't have any additional information on this plant other than it is native to Borneo and is in the Callimusa section rather than the rhodochlamys section, to which M. velutina belongs.
You don't have to be crazy to grow Bananas in Alberta, but it helps