This is the shade of Cây Trứng Cá (Fish-egg Tree? a silly litteral name). But that's the only name that this tree is known for because its fruit is edible and the contents and seeds inside looks similar to fish-egg. And the Mekong people just named it as described. One very good use for this type of tree is that its shade could cover a big area and its leaves and branches spread out evenly along the top...providing very efficient shade.