This beauty is one of the many members of the huge sweet orange group, but certainly not to be lost in the crowd. The orange flesh of the memorably flavorful fruit may be flecked with (or completely colored) rust, scarlet, garnet, or purple and may yield a dramatically sanguine juice: hence the name. Although yet to win large-scale appreciation in the United States, blood oranges are enormously popular all over Europe. (In hotels in Sicily, for example, the tart burgundy juice is served at breakfast as a matter of course.)