Note:  Do not rely on this information. It is very old.


Hesperidium, so named from the legend of the golden apples of the Hesperides, is the technical term for the fruit of the orange tribe, a superior polycarpellary syncarpous succulent fruit, belonging to the nuculane type. It has a leathery epicarp, studded with oil-glands, a white woolly mesocarp and a thin membranous endocarp dividing the numerous carpels, which are each usually two-seeded. From the inner surface of this endocarp are produced rows of large spindle-shaped cells, filled with watery acid or sub-acid juice, which fill the carpels as the pulp of the fruit.