Sapindaceae is the genus

This is a West Indies fruit that is extremely flavorful

The seeds are best eaten as nuts after being roasted on a fire.   There is a slow-growing version of this tree in Hawaii which has similar fruit, pulp, and seed.  These seeds are usually eaten after being roasted. 

Lanua

This small genus of trees is found in southeast Asia and Malaysia.       The fruit of some species are eaten.   The dark red fruit are used in the Philippines Islands, where the roasted seeds taste like chestnuts.

In South Africa the fruit is edible and oil is often extracted from the seed instead of being eaten.

Fiji Longan
Langsir

This medium sized tree grows throughout Malaysia.  The oily seeds are eaten after being roasted.   Sometimes the trees are found in Polynesia.   The fruits are from 1/2" to 2" large in diameter with smooth, thin, brownish rind and pulpy seeds.   The seeds are edible when roasted.

The fruit is a vivid Chinese red color which, upon reaching pea size, gradually disappears and fades into a lime green color.   The fruits are borne in clusters like the lychee and it takes about eleven fruits to make a pound.    The semi-transparent white pulp contains a single marble-sized seed, which may be eaten boiled or roasted.    The tree has been successfully cultivated in Florida where it flowers in September and bears fruit in December.

Sopaberry

This comprises thirteen species of shrubsEast Indies.  The fruits of some species can be used as a soap.   The seed contains 50% of a thick, greenish, drying oil.   They can be eaten when fully ripe but care should be taken only to put the seed in the mouth because the latex in the fruit wall is caustic.

Ceylon Oak
Lac Tree     Found in the sub-Himalayas eastward to Java.   The seeds yield an oil which is used in Malabar for culinary and lighting purposes.   it is reputed to be the original Macassar Oil and has been exported as an oil product to Germany.

Bladder Nut   There are ten species of the Bladder Nut in the North Temperate Zone.   The kernels of the fruit taste like pistachios and they have been exported to Germany where children love them.

There is an American version called the AMERICAN BLADDER NUT and the plant has seeds containing a sweet oil.  These are sometimes eaten like pistachios.   The shrub is found in the north and eastern parts of the United States.   The fruit is triangular in shape, measuring 1-1/2" in lenght by 3/4" in width.    The seed is covered by a thin paper shell of a redish brown color and has a rather long sharp point at the apex.   Each of the tree cells contains several (usually three) small, smooth and very hard shining seeds.   The fruits remain on the shrub during the winter and are best used as an ornamental.