Annona glabra is a tropical fruit tree in the family Annonaceae, in the same genus as the Soursop and Cherimoya. Common names include pond apple, alligator apple (so called because American alligators often eat the fruit), swamp apple, corkwood, bobwood, and monkey apple. The tree is native to Florida in the United States, the Caribbean, Central and South America, and West Africa. It is common in the Everglades. The A. glabra tree is considered an invasive species in Sri Lanka and Australia. It grows in swamps, is tolerant of saltwater, and cannot grow in dry soil.
Unlike the other Annona species, the pulp of the fruit when ripe is yellow through orange instead of whitish. The fruit is edible for humans and its taste is reminiscent of ripe Honeydew melon. It can be made into jam, and it is a popular ingredient of fresh fruit drinks in Maldives. In the older days the seeds were crushed and cooked in coconut oil and applied to hair to get rid of lice.
The flesh is sweet-scented and agreeable in flavor, but it has never attained general popular use unlike Soursop and other related fruits. Experiments in South Florida have been conducted to use it as a superior rootstock for Sugar-apple or Soursop. While the grafts initially appear to be effective a high percentage of them typically fail over time. Soursop on Pond-apple rootstock has a dwarfing effect.
Recent research suggests that its alcoholic seed extract contains anticancer compounds that could be used pharmaceutically.