A lettuce is pictured at Kajodlingen farm in Gothenburg, Sweden, September 28, 2016. [Photo/Agencies]

18. Lettuce 萵苣

Lettuce originated from the Mediterranean coast, and appeared in China around the Sui (AD 581-618) and Tang dynasties.
萵苣發源于地中海沿岸，隋朝（公元581-618年）和唐朝期間開始在中國出現。