Cross-Section of a Bergamot Orange
This photo shows a cross-section of a bergamot orange, the type of orange used in flavoring Earl Grey tea. Although called an "orange", this fruit isn't exactly the same as other oranges typically eaten. It is probably a hybrid of Citrus limetta and bitter orange. Although edible, it has a strong flavor and is more used as a flavoring or perfume than as food.
This image is featured in our article on Earl Grey Tea.