Satsuma orange

Satsuma [sat-SOO-muh] - A loose-skinned orange, it is a type of seedless mandarin orange with thin skin. In most citrus producing areas, satsuma mandarin is the preferred name, but satsuma tangerine is also used.

Grown in cool subtropical regions of Japan, Spain, central China, Korea, Turkey, along the Black Sea in Russia, southern South Africa, South America, and on a small scale in central California and northern Florida. The world's largest satsuma industry is located in southern Japan where climatic conditions are favorable for the production of early ripening satsuma tangerines of high quality. In the United States, it is grown mostly in the southernmost parishes of Louisiana. The fruit from a young tree averages 1.8 inches in diameter, approximately three-quarters the size of a tennis ball. With its smooth, thin, lightly attached skin, satsumas have become known as the "kid-glove or zipper-skin citrus" due to the ease with which the skin can be removed and internal segments separated. Depending on the weather and climate conditions, the fruit is harvested in the early to mid-fall. The fruit is juicy and very sweet, low in acid, and almost seedless, with an average of only 1.5 seeds per orange

http://edis.ifas.ufl.edu/