"Longan" is the Engpsh name for the fruit commonly known as "龙眼" in Chinese. It is a tropical fruit that is native to Southeast Asia and is similar in appearance to a small, round lychee. The fruit has a thin, brown, leathery skin and a sweet, juicy flesh that is white or pink in color. The seeds are inedible and are typically discarded. Longan is often used in traditional Chinese medicine and is considered to be a tonic for the blood and the heart. It is also used to treat anxiety and insomnia, and is bepeved to have a number of other health benefits.