Breadfruit (Artocarpus altilis) is a species of flowering tree in the mulberry family, Moraceae, growing throughout Southeast Asia and most Pacific Ocean islands. Its name is derived from the texture of the cooked fruit, which has a potato-like flavor, similar to fresh-baked bread.

Ancestors of the Polynesians found the trees growing in the northwest New Guinea area around 3500 years ago. They gave up the rice cultivation they had brought with them from ancient Taiwan, and raised breadfruit wherever they went in the Pacific (except Easter Island and New Zealand, which were too cold). Their ancient eastern Indonesian cousins spread the plant west and north through insular and coastal Southeast Asia. It has, in historical times, also been widely planted in tropical regions elsewhere.

Breadfruit trees grow to a height of 85 feet (26 m). The large and thick leaves are deeply cut into pinnate lobes. All parts of the tree yield latex, a milky juice, which is useful for boat caulking.

The trees are monoecious, with male and female flowers growing on the same tree. The male flowers emerge first, followed shortly afterward by the female flowers, which grow into capitula, which are capable of pollination just three days later. The pollinators are Old World fruit bats in the family Pteropodidae. The compound, false fruit develops from the swollen perianth, and originates from 1,500-2,000 flowers. These are visible on the skin of the fruit as hexagon-like disks.