This is a picture of Langsat Fruits. I got it from Pontianak, West Borneo, Indonesia. Langsat, also known as Lanzones or Lansium Domesticum, is a species of tree in the family Meliaceae. Some people also call it duku, kokosan, pisitan, and celoring. The plant, which originates from western Southeast Asia, bears edible fruit. It is the provincial flower for the Indonesian province of South Sumatra, Indonesia.