Langsat (Lansium domesticum Corr.)
A somewhat less edible fruit of the family Meliaceae, the langsat, Lansium domesticum Corr., is also known as lansa, langseh, langsep, lanzon, lanzone, lansone, or kokosan, and by various other names in the dialects of the Old World tropics.
The tree is erect, short-trunked, slender or spreading; reaching 35 to 50 ft (10.5 to 15 m) in height, with red-brown or yellow-brown, furrowed bark. Its leaves are pinnate, 9 to 20 in (22.5-50 cm) long, with 5 to 7 alternate leaflets, obovate or elliptic-oblong, pointed at both ends, 2 3/4 to 8 in (7-20 cm) long, slightly leathery, dark-green and glossy on the upper surface, paler and dull beneath, and with prominent midrib. Small, white or pale-yellow, fleshy, mostly bisexual, flowers are home in simple or branched racemes which may be solitary or in hairy clusters on the trunk and oldest branches, at first standing erect and finally pendant, and 4 to 12 in (10-30 cm) in length.
The fruit, borne 2 to 30 in a cluster, is oval, ovoid-oblong or nearly round, 1 to 2 in (2.5-5 cm) in diameter, and has light grayish-yellow to pale brownish or pink, velvety skin, leathery, thin or thick, and containing milky latex. There are 5 or 6 segments of aromatic, white, translucent, juicy flesh (arils), acid to subacid in flavor. Seeds, which adhere more or less to the flesh, are usually present in 1 to 3 of the segments. They are green, relatively large–3/4 to 1 in (2-2.5 cm) long and 1/2 to 3/4 in (1.25-2 cm) wide, very bitter, and sometimes, if the flesh clings tightly to the seed, it may acquire some of its bitterness.