Lime

Unlike fruits with a single wild ancestor and a tidy birthplace, the lime has a complicated family tree. Citrus originated broadly in tropical and subtropical Asia, especially the region stretching from northeastern India and southern China into Southeast Asia. As citrus plants moved and crossed, people selected several distinct fruits that English speakers now call limes.

The small, aromatic Key lime, also called Mexican lime, is generally classified as Citrus × aurantiifolia. It is a hybrid with citron and micrantha ancestry, linking it to South and Southeast Asian citrus populations. The larger, usually seedless Persian or Tahiti lime, Citrus × latifolia, is itself a later hybrid associated with Key lime and lemon ancestry. Neither should be described as a simple wild species native to Mexico, Persia, or Tahiti.

Trade carried lime ancestors westward through the Indian Ocean and the Middle East into the Mediterranean world. European maritime networks later spread them through the Caribbean and the Americas, where warm climates supported commercial orchards. Their acidity and fragrance made them valuable in drinks, preserves, sauces, and shipboard provisions.

Today, Mexico is one of the leading commercial sources of limes, while India, China, Brazil, Egypt, and Spain are also important producers. California grows most of the United States’ commercial lime crop, although domestic supply is modest compared with imports. The lime’s modern identity is therefore global, but its deepest botanical roots remain in tropical Asia.