The area near us was used as Tung tree farm and there are still Tung trees that sprout up all over. They are blooming now and the blossoms are lovely.
"It has been introduced to Argentina, Paraguay, Thailand, and the United States for oil production. Just prior to World War I, a number of seeds received from the U.S. Ambassador to China were planted in California, but the young trees could not take hold in the dry climate. David Fairchild of the Department of Agriculture successfully introduced the tree in 1905 in the U.S. Gulf States from Florida west to eastern Texas.  After flourishing from the 1920's to the 1940's the American tung oil industry was wiped out by frost and hurricanes. In 1969, many of the trees were wiped out by Hurricane Camille, and the plantations never recovered. Increased competition from overseas has ended cultivation in the United States and the tree is now listed as an invasive species in Florida.
Global production of the fruit has risen from just over 100,000 tonnes in 1970 to almost 200,000 tonnes by 1980. Fruit yields are typically in the range of 4.5–5 tonnes per hectare. A number of cultivars have been selected for increased yield and small tree size, including 'Folsom', 'Cahl', 'Isabel', 'La Crosser', and 'Lampton'."