桂圆,又称龙眼。它与荔枝是一对孪生的兄弟,同属于一个家族——无患子科,但同科不同属,龙眼自成一属——龙眼属。桂圆古人称之为龙目,它的别名很多,如圆眼、益智、蜜脾、比目、荔枝奴等等。 桂圆原产于我国的海南、云南等地,如今盛产于福建、台湾、四川、贵州、广东、广西等省区。凡是生长荔枝的地方,就有桂圆生长。一般荔枝先熟,桂圆紧接着就熟了,所以人们称荔枝为兄,桂圆为弟。桂圆同荔枝一样,性喜温暖湿润、多光照的环境,桂圆比荔枝对环境的适应性更强一些。桂圆的果实比荔枝小而且圆,宋代诗人苏东坡曾有诗曰:“龙眼与 Longan, also known as longan. It and the litchi is a pair of twin brothers, belong to the same family - Sapindaceae, but different from the same genus, longan itself as a genus - longan. Longan known as longan, its alias many, such as round eyes, puzzle, honey spleen, than the head, litchi slaves and so on. Longan originated in China’s Hainan, Yunnan and other places, now rich in Fujian, Taiwan, Sichuan, Guizhou, Guangdong, Guangxi and other provinces and autonomous regions. Where growing litchi, there longan growth. General lychee first cooked, longan followed immediately cooked, so people call litchi brother, longan for brother. Longan with the same litchi, like warm, moist, multi-light environment, longan than litchi adaptability to the environment more. Longan fruit than lychee small and round, Song Dynasty poet Su Dongpo poem said: "Longan and