Hesperidium

: hesperidia) is a modified berry with a tough, leathery rind, as in the oranges and lemons of the genus Citrus.

[1][2] Carl Linnaeus gave the name Hesperideæ to an order containing the genus Citrus, in allusion to the golden apples of the Hesperides.

The fleshy interior is composed of separate sections, called carpels, filled with fluid-filled vesicles that are specialized hair cells.

Unlike most other berries, the rind of cultivated hesperidia is generally not eaten with the fruit because it is tough and bitter.

A confection called succade can also be produced by candying the inner rind (known as pith or albedo) of the citron or lemon.