Longan, (Dimocarpus longan), also spelled lungan, tropical fruit tree of the soapberry
family (Sapindaceae), native to Asia. The edible white-fleshed fruits are somewhat
similar to the related lychee and are commonly sold fresh, dried, or canned in syrup.
The juicy flesh has a mildly sweet and musky flavour.

Longan flowers and seeds are rich in polyphenols, which are antioxidants. They
contain proanthocyanidins, which are also the main active compounds in grape seed
extract and have been researched for supporting heart and immune health.