Dear Vidya, Ambalanga is Hog plum. We have two ambalanga trees at home. MIL would send it here by putting in salt water (like uppu manga) when any one comes. It's very tasty! My ma would make pickle with it..(I am not sure this is the hog plum seen in American states). It is green in color and yellow when ripe. We would put this in curries instead of tamarind or mango..