aurantiifolia

Citrus aurantiifolia is a small evergreen tree in the citrus genus, commonly known as the Key lime, Mexican lime, or West Indian lime. It produces small, aromatic fruits and is widely cultivated for juice and zest.

The tree typically reaches 3–5 meters in height and is often armed with thorns. Leaves are oval with a rounded, sometimes winged petiole. Flowers are white and strongly fragranced. Fruits are round to oval with a diameter of about 25–38 millimeters; the rind is thin and the flesh highly acidic, with a distinctive lime aroma when zest is released.

Originating in Southeast Asia, Citrus aurantiifolia was introduced to the Caribbean, Central America, and Florida during historical trade and colonization. It is now cultivated in many tropical and subtropical regions. The species is commonly used as rootstock for other citrus varieties and, for many consumers, as a primary source of lime juice and flavoring.

Uses and cultivation: The fruit is widely employed in beverages (such as limeade and cocktails like margaritas), desserts (including lime pie), and various culinary applications. Zest and essential oils from the rind and leaves are used in flavoring and perfumery. The tree prefers warm, frost-free climates, well-drained soils, and regular moisture. It is sensitive to cold and can be affected by common citrus pests and diseases, including citrus canker and root rot, requiring appropriate management in affected areas.