The Pawpaw Fruit
The pawpaw is the largest edible fruit that is native to the U.S. The unique flavor of the fruit resembles a blend of various tropical flavors, including banana, pineapple, and mango. The flavor and custard-like texture make the pawpaw a good substitute for bananas in almost any recipe. A few common names are “poor man's banana”, “American custard apple”, and “Kentucky banana”. The pawpaw has more than double vitamin C, riboflavin and niacin as apple, banana and orange.
More info about pawpaws:
http://en.wikipedia.org/wiki/Pawpaw