The sweet orange is the most widely cultivated and consumed type of Citrusworld-wide. Sweet orange cultivars can becategorized into four distinct groups:
Common Orange – also known as ‘blond’ oranges in Europe and ‘round’ oranges in Florida. It is the most important of the sweet oranges with many varieties now in existence;
Navel Orange – the most popular orange grown for consumption as fresh fruit;
Blood Orange – contains a chemical property that gives a red pigmentation to the flesh;
Acidless Orange – is of minor importance worldwide commercially but significant in several regional areas.
Following is a list of some of the more well-known varieties. Their history and origins, unless otherwise noted, are from The Citrus Industry Vol 1 (1967) by RW Hodgson. Observations and notes are from the researchers at the UC Riverside Citrus Variety Collection.