Generations of flowers, aliases: limes, back oranges, lotus roots. Latin name: Citrus aurantium L. Genus Rutaceae, Citrus. Small trees, dense branches and leaves, many spines, long branches with spines up to 8 cm. It has green leaves and dangling golden fruits, which are rare gifts in domestic flowers. The fruits of the generations are dark green at first, and become orange-yellow after maturity. Such as conservation, the fruit can persist until the third year, so it is also called "generation". From May to June, the flowers are picked in batches before opening, and dried in time. It is better to have complete, yellowish white, strong aroma. The main origin of the generation of flowers is Zhejiang, China, which is now cultivated in various provinces in southeast China. There are many potted plants in North China and the Yangtze River Basin.