The Meyer lemon (Citrus × meyeri) is originally from China and thought to be a cross between a true lemon and a mandarin orange or sweet orange. The Meyer lemon was introduced to the United States in 1908 as S.P.I. #23028, by the agricultural explorer Frank Meyer, an employee of the United States Department of Agriculture who collected a sample of the plant on a trip to China. It is commonly grown in China potted as an ornamental plant.