
The Persian lime is most likely from a cross between key lime (Citrus aurantiifolia) and lemon (Citrus × limon).
Although there are other citrus species that are referred to as limes, C. × latifolia is the most widely cultivated lime species for commercial use, and accounts for the largest share of the fruits sold as limes.
The tree is nearly thornless. The fruit is about 6 centimetres (2.4 in) in diameter, often with slightly nippled ends, and is usually sold while green, although it yellows as it reaches full ripeness. It is also widely available dried, as it is often used this way in Persian cuisine. It is larger, thicker-skinned, with less intense citrus aromatics than the key lime (Citrus aurantifolia). The advantages of the Persian lime in commercial agriculture compared to the key lime are the larger size, absence of seeds, hardiness, absence of thorns on the bushes, and longer fruit shelf life. They are less acidic than key limes and do not have the bitterness that lends to the key lime’s unique flavor.

Limes originate from the Middle East, and were first grown on a large scale in Persia (now Iran) and southern Iraq.
