The three main varieties grown in North America (California, to be precise) are Moro, Sanguinellis and Toracco. Moro, developed in Italy, has great colouring but is a bit more sour. Another variety, the Ruby Red, is grown in Florida.
Blood Oranges are really all about their unusual colouring: use in dishes such as fruit salads where the colour can be displayed for effect.
Store refrigerated for up to 1 week.
First discovered in Sicily in the 1600s. Brought to the US by immigrants.