Myrtaceae

Genus: Psidium
Species: guajava
Author: L.
Elevation: bear fruit up to 1500m; survive up to 2000m
Avg. Height: 10m

Source: http://tropical.theferns.info/viewtropical.php?id=Psidium+guajava
Photo Source: http://eol.org/pages/2508593/media?page=1

Genus: Eugenia
Species: Unknown