Citrus × sinensis, a hybrid between pomelo and mandarin, also known as the sweet oranges, is a commonly cultivated species of orange that includes Valencia oranges, blood oranges and navel oranges.

The pomelo, from the family Rutaceae, is the largest citrus fruit, and the principal ancestor of the grapefruit. It is a natural, non-hybrid, citrus fruit, native to Southeast Asia. Similar in taste to a sweet grapefruit, the pomelo is commonly consumed and used for festive occasions throughout Southeast Asia and East Asia. As with the grapefruit, phytochemicals in the pomelo have the potential for drug interactions.