The lemon is a fruit that shouldn’t exist in the wild. It’s a hybrid, a cross between a citron and a bitter orange, and it probably first appeared as an accidental garden cross in Northeast India or Myanmar over a thousand years ago.
A hybrid’s journey
Citrons were among the first citrus fruits cultivated by humans, grown in the Indus Valley by 4000 BCE. Bitter oranges arrived from China. Somewhere in the overlap of their ranges, a cross occurred. The lemon inherits its acidity from the citron and its juiciness from the bitter orange.
Arab traders carried lemons across the Middle East and North Africa. The Moors brought them to Spain. Crusaders encountered them in Palestine. By the 1400s, lemons grew across the Mediterranean. Columbus brought lemon seeds to Hispaniola in 1493.
The scurvy connection
Scurvy killed more sailors than combat, storms, and shipwrecks combined during the Age of Exploration. In 1747, Scottish surgeon James Lind conducted one of the first controlled clinical trials in history, giving different remedies to groups of scurvy patients. The men who received citrus fruit recovered in days.
It took the British Navy another 42 years to mandate lemon juice rations. When they later switched to cheaper limes from British colonies, the reduced vitamin C content made the rations less effective, but the nickname “limey” stuck.
The actual chemistry wasn’t understood until 1932, when Albert Szent-Györgyi isolated vitamin C (ascorbic acid, literally “anti-scurvy acid”).
A word that traveled
“Lemon” traces back through Old French limon, medieval Latin limonem, Arabic laymūn or līmūn, and Persian līmūn. The Persian likely borrowed from a Sanskrit word. The same root gives us “lime,” “lemonade,” and “limousine” (from Limousin, France, a region named for its lime trees, though this etymology is debated).
In many languages, the words for lemon and lime are interchangeable or reversed. Spanish limón can mean either. This confusion persists in international trade: what Americans call a “lime” is called a “lemon” in some parts of the world.
Amalfi, Meyer, and the terroir of lemons
The Amalfi Coast’s Sfusato Amalfitano lemon is a protected designation of origin. It grows on terraced hillsides above the Mediterranean, harvested by hand. Its thick, fragrant rind contains more essential oils than commercial lemons. A single Amalfi lemon can cost several dollars.
The Meyer lemon, popular in American cooking, is actually a lemon-mandarin hybrid brought to the U.S. from China by Frank Meyer in 1908. It’s sweeter, thinner-skinned, and more fragrant than a standard Eureka or Lisbon lemon. Most Meyer lemons sold today are the “Improved Meyer,” a virus-free cultivar developed in the 1970s after the original was found to be an asymptomatic carrier of citrus tristeza virus.