First of all, Citrus is a genre of the Rutacea family that embrace species of big bushes and perennial trees of 5 to 15 meters.
They are angiosperm and their fruit is a hesperidium with citric acid (C6H8O7)
An hesperidium is a modified form of a berry, that looks like this:
They are angiosperm and their fruit is a hesperidium with citric acid (C6H8O7)
An hesperidium is a modified form of a berry, that looks like this:

