The Story of Lettuce

Garden lettuce is Lactuca sativa, not prickly lettuce (Lactuca serriola), the edible weed UC IPM treats as a separate species.

How it was found

Kew maps Lactuca sativa as a cultigen from western Asia. Native list printed: Iraq, Sumatera. Introduced widely, including California and many other U.S. states, parts of Europe, Asia, Africa, and the Americas. USDA GRIN: cultivated (only cult.) — no native-country table. Tahoe Basin UCCE Master Gardeners: native to the eastern Mediterranean region and western Asia; wild form thought to be closely related to Lactuca serriola (prickly lettuce). Kew’s cultigen + Iraq/Sumatera Native list and UC’s eastern Mediterranean / western Asia wording are not the same statement.

Tahoe Basin UCCE MG: Egypt 4500 BC cultivation — initially grown for latex-like sap and oils; later edible leaf forms developed. Kew prints cultigen from western Asia, not a first-cultivation country or date. GRIN prints only cultivated. A Riverside MG fact sheet’s “Ancient Egyptians cultivated lettuce 6,000 years ago” line cites Soft Schools and is skipped.

How people used it

Kew lists food (also animal food). UC IPM: cool-season vegetable grown for leaves (leaf lettuce most common in home gardens; head types include Bibb, Iceberg, and Romaine). Tahoe UCCE MG: later edible leaf forms; California leads U.S. production with iceberg the most common store type as printed.

Kew: used to treat unspecified medicinal disorders and as a medicine (no named remedy on the taxon page). GRIN lists human food as oil/fat in Egypt (citing de Vries 1997) — an economic-use row, not copied as a folk-medicine recipe. Tahoe’s Adonis/aphrodisiac/lettuce-opium lines are skipped.

Timeline

1. 4500 BC (as printed by UCCE Tahoe MG)

   Egypt, sap first, then leaves

   Tahoe Basin UCCE Master Gardeners: Egypt 4500 BC cultivation; initially grown for latex-like sap and oils; later edible leaf forms developed. That is UC’s date, not Kew/GRIN consensus. Kew prints cultigen from western Asia without that year.

   Tahoe Basin UCCE MG — Lettuce & Kale workshop (2019)

2. 7th century

   Arrived in China

   Tahoe Basin UCCE MG: lettuce arrived in China by the 7th century, though how or by whom is unclear on that page. A travel note, not a second origin country.

   Tahoe Basin UCCE MG — Lettuce & Kale workshop

3. 1494

   Columbus, the New World

   Tahoe Basin UCCE MG: Columbus in 1494 brought lettuce to the new world. Same year as the cucumber Haiti planting on the cucumber page — a different crop, a different packet sentence.

   Tahoe Basin UCCE MG — Lettuce & Kale workshop

4. 17th century

   California, as the slide prints it

   Tahoe Basin UCCE MG: California, 17th century (as printed on the history slide). That is the packet’s California wording — not a Mission year invented from another crop.

   Tahoe Basin UCCE MG — Lettuce & Kale workshop

5. 1753

   Named in Species Plantarum

   Kew accepts Lactuca sativa L., first published in Sp. Pl.: 795 (1753). USDA GRIN: Sp. pl. 2:795. 1753.

   Kew POWO; USDA GRIN

Cool to know

Growing notes for this plant live on the Plant Wiki. This page is origin and use, not a How-To.