citrus fruits [2]
Somewhat acidic fruits with a high vitamin C content comprising numerous sections and covered with a rind that has an external layer called zest.
citron 
Extensively grown in Corsica and Israel, this somewhat dry fruit is rarely found fresh and is mostly sold candied.
pomelo 
Extremely popular in many Asian countries, it has only recently become available in the West; less juicy than the grapefruit, it is mostly cooked or candied.
orange 
Widely available, it is often eaten plain or in juice, and it goes well with duck; it yields a flavor essence and an essential oil.
grapefruit 
The pink grapefruit is sweeter and less bitter than the white one that has yellow flesh; it is often cut in half and eaten plain, with a spoon.