Pawpaw (Common Pawpaw, Custard Apple, Indiana Banana)
Kingdom: Plantae, Division: Tracheophyta, Class: Magnoliopsida, Order: Magnoliales, Family: Annonaceae, Genus: Asimina, Species: A. triloba · Annonaceae (Custard Apple family) · Simple, deciduous leaf
Species
Asimina triloba
Leaf Type
Simple, deciduous leaf
Family
Annonaceae (Custard Apple family)
Shape
Obovate-lanceolate (narrower at the base and broader near the apex)
Size
Approximately 7 to 9 inches long and 3 to 4 inches wide, which is on the larger side but well within the typical range for mature leaves of Asimina triloba (ranging from 4 to 12 inches).
Margin
Entire (smooth, unbroken edge)
Arrangement
Alternate arrangement along the twig
Rarity
Common throughout its native range, though individual trees can be locally scattered in forest understories.
Color & Pattern
Rich medium to dark green on the upper surface with a slightly paler matte green underneath. No variegation or complex patterns are present. The color is healthy and typical for a summer-mature leaf.
Venation Pattern
Pinnate venation with a prominent, raised midrib and distinctly curved secondary veins branching outward.
Texture & Surface
Smooth (glabrous) upper surface with a slightly leathery or papery feel; veins are slightly raised on the lower surface.
Description
The common pawpaw is a small, deciduous understory tree known for producing the largest edible fruit native to North America. The leaves are characteristically large, drooping, and tropical-looking, giving the understory a distinctly exotic feel. In spring, the tree produces unusual, maroon, bell-shaped flowers before the leaves fully emerge. In autumn, the foliage turns a brilliant, striking golden-yellow.
Key Features
Distinguished by very large, simple, alternate, obovate leaves with entire margins and prominent pinnate venation. Crushed leaves and twigs often emit a distinct, somewhat pungent or spicy-sweet odor reminiscent of bell pepper or engine fuel.
Habitat
Understory tree typically found in rich, moist bottomland forests, floodplains, along streams, and shaded ravines with well-drained, slightly acidic soils.
Geographic Range
Native to the eastern, southern, and midwestern United States, extending from New York and southern Ontario west to Nebraska, and south to northern Florida and eastern Texas.
Condition Notes
Good overall health with a vibrant green color. There is minor insect herbivory (a small marginal tear) and a dark fungal leaf spot on the lower right quadrant, but the leaf is otherwise robust and fully functional.
Interesting Facts
Pawpaws are the exclusive host plant for the larval stage of the Zebra Swallowtail butterfly (Eurytides marcellus). The tree produces natural acetogenins in its leaves and twigs, which act as powerful insecticides protecting the plant from many herbivores.
Medicinal & Uses
Historically, Native Americans used the inner bark for making ropes and baskets and consumed the sweet, custard-like fruits. Modern research investigates pawpaw compounds (annonaceous acetogenins) for potential anti-cancer properties. The wood is lightweight and of little commercial timber value.
Ecological Role
Serves a vital ecological role as the exclusive larval host for the Zebra Swallowtail butterfly. The large fruits are eaten and seeds dispersed by various mammals such as raccoons, opossums, and foxes.
Similar Species
Can be superficially confused with certain magnolias (like Magnolia tripetala) due to large leaf size, but pawpaw leaves lack the stipule scars that completely encircle the twig and have a distinct pungent scent when crushed.
Foraging Tips
Look in damp deciduous woodlands and along riverbanks during spring and summer. Search for the distinctive drooping, large green leaves arranged spirally around the twigs. In late summer to early fall, look on the ground beneath the canopy for fallen, custard-like edible fruits.
Toxicity Warning
Mildly Toxic to Non-toxic. The fruit flesh is safe and delicious when ripe, but consuming the skin, seeds, or large quantities of the fruit can cause gastrointestinal upset in some people. Some individuals may experience contact dermatitis from handling the leaves or skin of the fruit.