Pawpaw (Asimina) is a genus of eight or nine species of small trees with large leaves and fruit, native to eastern North America. The genus includes the largest edible fruit indigenous to the continent. They are understory trees found in deep fertile bottomland and hilly upland habitat. Pawpaw is in the same family (Annonaceae) as the custard apple, cherimoya, sweetsop, and soursop, and it is the only member of that family not confined to the tropics.
Paw paw fruit is a large edible berry, 5–16 cm long and 3–7 cm broad, weighing from 20–500 g, with numerous seeds; it is green when unripe, maturing to yellow or brown. It has a flavor somewhat similar to both banana and mango, varying significantly by cultivar, and has more protein than most fruits.
The fruits are quite popular, but the shelf life of the ripe fruit is almost non-existent, for it soon ripens to the point of fermentation. Those who wish to preserve the fruit for the future do so by dehydration, making it into jams or jellies, or pressure canning by using the numerical values for bananas. In southern West Virginia pawpaws are made into a native version of banana nut cake or fruit cake, and baked inside canning jars, the lids heat-sealed to keep the food for at least a year.