Musa ingens
See for yourself
http://www.users.globalnet.co.uk/~drc/mingens003.htm
http://www.users.globalnet.co.uk/~drc/mingens002.htm
http://www.users.globalnet.co.uk/~drc/mingens004.htm
http://www.users.globalnet.co.uk/~drc/mingens001.htm
And I have just found my shipment of 10 seeds of Musa ingens. I thought I lost them. I hope they are still viable.
So what's the best technique to germinate these mostly unknown seeds. Simulate the cold elevated rainforest conditions of PNG?