Underneath the skin, the fruit is divided into five or six slices of translucent, juicy flesh. The sweet juicy lanzones..
Fruits are ovoid, roundish orbs around five centimeters in diameter, usually found in clusters of two to thirty fruits along the branches and trunk. Each round fruit is covered by yellowish, thick, leathery skin. Underneath the skin, the fruit is divided into five or six slices of translucent, juicy flesh. The flesh is slightly acidic in taste, although ripe specimens are sweeter. Green seeds are present in around half of the segments, usually taking up a small portion of the segment although some seeds take up the entire segment's volume. In contrast with the sweet-sour flavor of the fruit's flesh, the seeds are extremely bitter. The fruit taste has been compared to a combination grape and "perfect" grapefruit with no bitterness. Yet the seeds if bitten have the bitterness of a grapefruit yet stronger. The sweet juicy flesh contains sucrose, fructose, and glucose.
Ecology and life history
It grows wild in Sumatra forests where a wide and longest river in Indonesia lay across the southern part of Sumatra. The river rises and floods the forest lands for a few months, when it subsides, the flood leaves plenty of fallen leaves and twigs enriching and moistening a large area of the forest bed, resulting in ideal conditions for the plant to grow naturally. Local people will come and harvest it as natural forest produce. They climb up the tree with ripe fruits (after observing it), holding with their hands on the smaller branches and shaking it. Mature fruits will fall easily down to the ground. They will then collect it and transport it on a small boat on a nearby river to the villages and sell it. In a good year a 20-year old tree can produce 100 kg of fruits, however fruiting is often uneven.
Etymology and taxonomic history
Lansium domesticum is currently classified within the family Meliaceae.
It is known variously as langsat (Malay); lansones , lansa, langseh, langsep, lanzon, lanzone, lansone(Filipino); langsad (for the type of which its skin is quite sticky to the fruit), longkong (for the type of which the skin is easily peeled off without milky latex) (Thai); duku, langsat, kokosan (Indonesian), Gadu Guda (Sri Lanka), lòn bon and bòn bon (Vietnamese).
In certain parts of the Visayas, the fruit is called buwa-buwa or bowa-bowa, and the tree is called buwahan or bowahan.