Catching a Rainbow

Both the mandarin and the clementine have the same nutritional value, indeed they are as similar as two drops of water and have become a mainstay of winter citrus fruits. They are often confused as being the same and often one is sold as the other, which can be confusing, especially when other varieties such as the tangerine and the satsuma are also considered.




• The mandarin orange
The Mandarin orange (Citrus reticulata) or simply mandarin, comes from a small citrus tree which has fruit resembling an orange.
Citrus fruits in general, as with so many other fruits, are native to China, spreading throughout Southeast Asia and ultimately the globe since they were first cultivated 4,000 years ago. The name mandarin refers to the bureaucrats and priests of imperial China who wore bright orange robes and who were often the only class of people permitted to eat the fruit.
Although cultivated for over 3,000 years in China, mandarin oranges did not reach Europe in large quantities until the late 18th century. Specimen trees were imported into England from China in 1805 and by the mid-1800s, the mandarin orange was found throughout the Mediterranean. Later the name tangerine was reserved for a specific reddish orange cultivar of the mandarin found in Algeria, but imported into Europe via Tangiers. (The tangerine is a cultivar of the mandarin and not a distinct subclass).
The tree is more drought tolerant than the fruit but both are easily damaged by the cold. There are many types of mandarin, many bred by cross pollination with another citrus fruit. Most citrus fruit trees are usually self-fertile which results in fruit with seeds although some are parthenocarpic which requires no cross pollination, the fruit developing without seeds as is the case with the increasingly popular clementine.





• Clementine
Said to have been found in Misserghin, Algeria by a Father Clement (Vincent Rodier, 1829-1904) over 100 years ago, the clementine arises from a natural crossing of the common mandarin and a sweet orange. Originally thought of as being a cross with the bitter Seville orange, this was proved not to be the case in 2002 by scientists at the French National Institute for Agricultural Research INRA.
Father Clement was working as the head gardener of an orphanage in Algeria when he found a different variety of fruit in a plantation of mandarins. The trees fruited much earlier than the original Chinese varieties and the fruit tasted much sweeter.
According to Louis Charles Trabut (1853-1929) a botanist working in Algeria, this highly important North African variety originated as an accidental hybrid of the Mediterranean mandarin and a willow-leafed ornamental variety. Following his recommendation the tree and the subsequent fruit were named by the Horticultural Society of Algiers as clementine.
Both Webber (1943, p. 558) and Tanaka (1954) two eminent botanists working in the field expressed doubt concerning the validity of this conclusion and more recently, a distinguished French authority in North Africa, has refuted it with convincing evidence. The current thought is that the clementine is of Oriental origin, probably Chinese, and that it is indistinguishable from and probably identical to the Canton mandarin described by Trabut in 1926, who also remarked on the similarities between the two.
The fruit are small, very sweet, and are usually seedless, unless they have been cross pollinated with another type of citrus fruit. The fact that clementine’s are seedless has led to their popularity in certain parts of the world, including the UK and the USA. However, the eating of seedless fruit in regions surrounding the Mediterranean has in the past been frowned upon as it was anecdotally believed to be a cause of impotence, and not in keeping with a Mediterranean lifestyle!




• Satsuma
The satsuma mandarin originated in Japan, more than 400 years ago, where it is known as mikan. The name satsuma is credited to the wife of a United States minister to Japan, General Van Valkenberg, who sent trees home in 1878 from Satsuma, the name of a former province.
There are some 100 different varieties of satsumas in Japan but only about a dozen varieties are exported. Once readily available in the UK, the satsuma has recently become hard to find and has in many areas been replaced by the clementine or the mandarin orange.
The satsuma has a particularly delicate flesh, which cannot withstand the effects of careless handling or vigorous transportation. The uniquely loose skin of the satsuma, which made it so popular with children, as it is so easy to peel, also meant that it was easily damaged and that any such bruising and damage would not be immediately apparent upon the typical cursory visual inspection associated with assessing the quality of other fruits. In this regard, the satsuma is often categorised by citrus growers as a hit-and-miss fruit and has accounted for its rapid decline in recent years.
One of the distinguishing features of the satsuma is the distinctive thin, leathery skin which is lightly attached around the fruit, enabling it to be peeled very easily in comparison to all other citrus fruits.


OTHER STUFF:
The colour of citrus fruits only develops in climates with a cool winter. In tropical regions with no winter, citrus fruits remain green until maturity.
The first common clementine introduced into Corsica was planted in 1925 by M. Don Philippe Semidei in Figaretto, on the eastern plain of the island.
Most mandarins end up as tinned fruit as they are able to stand the processing.


References
http://www.citrusvariety.ucr.edu/citrus/clementine.html
http://www.international.inra.fr/press/a_new_clementine_for_corsica
http://asaweb.huh.harvard.edu:8080/databases/botanists?id=100126