PRODUCT INFO Dimocarpus longan (Lum Yai) , commonly known as the longan, is a tropical tree species that produces edible fruit. It is one of the better-known tropical members of the soapberry family Sapindaceae, to which the lychee and rambutan also belong. The fruit of the longan is similar to that of the lychee, but less aromatic in taste "Anecdotal uses of longan fruit as a natural remedy include: a general tonic to increase energy and boost the immune system. depression. reducing stress. decreasing fatigue. boosting memory. improving memory. snake bites as an anti-venom." SEASON Longan is available between June - August.