Euphoria litchi

from The Collaborative International Dictionary of English v.0.48

longanberry \longanberry\ n.
   A tree ({Dimocarpus longan}) of Southeastern Asia to
   Australia grown primarily for its sweet translucent-fleshed
   edible fruit (the {longan}) resembling litchi nuts; -- it is
   sometimes placed in genera {Euphoria} or {Nephelium}.

   Syn: longan, lungen, {Dimocarpus longan}, {Euphoria litchi},
        {Nephelium longana}.
        [WordNet 1.5]

   2. Asian fruit similar to litchi.

   Syn: dragon's eye.
        [WordNet 1.5]