Citrus × meyeri
|Species:||C. × meyeri|
|Citrus × meyeri
Citrus × meyeri, the Meyer lemon, is a citrus fruit native to China thought to be a cross between a true lemon and either a mandarin or common orange. It was introduced to the United States in 1908 as S.P.I. #23028 by the agricultural explorer Frank Nicholas Meyer, an employee of the United States Department of Agriculture who collected a sample of the plant on a trip to China.
The Meyer lemon is commonly grown in China in garden pots as an ornamental tree. It became popular as a food item in the United States after being rediscovered by chefs such as Alice Waters at Chez Panisse during the California Cuisine revolution. Popularity further climbed when Martha Stewart began featuring them in her recipes.
Citrus × meyeri trees are around 6 to 10 ft (2 to 3 m) tall at maturity, though they can be pruned smaller. Their leaves are dark green and shiny. The flowers are white with a purple base and fragrant.
The Meyer lemon fruit is yellow and rounder than a true lemon. The skin is fragrant and thin, coloured a deep yellow with a slight orange tint when ripe. Meyer lemon fruits have a sweeter, less acidic flavor than the more common Lisbon or Eureka supermarket lemon varieties. The pulp is a dark yellow and contains up to 10 seeds per fruit.
Citrus × meyeri is reasonably hardy and grows well in warm climates. They are also fairly vigorous; a tree grown from seed usually begins fruiting in four years yielding thousands of lemons. While trees produce fruit throughout the year, the majority of the crop is harvest-ready in winter. Trees require adequate water, but less in the winter. For maximum yield, they should be fertilized during growing periods.
Meyer lemons are popular as ornamental plants due to their compact size, hardiness and productivity. They are highly decorative and suitable for container growing.
Improved Meyer 
By the mid-1940s the Meyer lemon had become widely grown in California. However, at that time it was discovered that a majority of the Meyer lemon trees being cloned were symptomless carriers of the Citrus tristeza virus, a virus which had killed millions of citrus trees all over the world and rendered other millions useless for production. After this finding, most of the Meyer lemon trees in the United States were destroyed to save other citrus trees.
A virus-free selection was found in the 1950s by Don Dillon of the California company Four Winds Growers, and was later certified and released in 1975 by the University of California as the 'Improved Meyer lemon' — Citrus × meyeri 'Improved'.
See also 
- National Public Radio. 18 February 2009 http://www.npr.org/templates/story/story.php?storyId=100778147&ft=1&f=1053
|url=missing title (help). Retrieved 2009-02-20. "For more than a century, the Meyer lemon was known mostly for its looks. In its native China, it was primarily a decorative houseplant. The Meyer lemon might still be decorating homes today if it weren't for one man. In the early 1900s, the U.S. Department of Agriculture sent Frank N. Meyer, an agricultural explorer (yes, that was his actual job title) on several trips to Asia with the mission of collecting new plant species. Among more than 2,500 plants that he introduced to the U.S., the Meyer lemon was named in his honor. Sadly, Meyer would never live to see the success of his namesake. He died on an expedition near Shanghai in 1918."
- Lowry, Patricia (Thursday, February 12, 2009). "When life hands you Meyer lemons, life is sweet". Pittsburgh Post-Gazette (Pittsburgh). ""Meyer lemons are sweet, thin-skinned and famous for their ethereal perfume. Although common in California backyards, they are just beginning to be commercialized. Ask your friends or relatives in California to send you some," Alice Waters wrote in her "Chez Panisse Cafe Cookbook" in 1999. A decade later you don't have to beg, thanks in part to Ms. Waters' championing of the Meyer and to more growers entering commercial production."
- University of California Riverside Citrus Variety Collection: Improved Meyer
- Four Winds Growers: Meyer Lemon Origins
- Reuther, Walter; Leon Dexter Batchelor, E. Clair Calavan, Herbert John Webber, Glenn E. Carman, Robert G Platt (June 1989). Citrus Industry: Crop Protection. University of California. p. 195. ISBN 0-931876-24-9.
|Wikimedia Commons has media related to: Citrus × meyeri|