Eugenia victoriana Cuatrec.

Eugenia victoriana is a small South American fruit tree of the genus Eugenia. Its common names include guayabilla and sundrop.

Eugenia victoriana has the largest fruit of all known Eugenia species. The tree first flowers in its third or fourth year. The fruits are orange-colored, and have sour flesh and two to four large seeds.

Eugenia victoriana - Wikipedia