(Psidium sartorianum)
Psidium sartorianum is a species of tree in the family Myrtaceae. It is native to North and South America. In much of Mexico it is called guayabillo; the Maya call it niedenzu and pichi' che'. In English it is called little guava. P. sartorianum is described as producing fruits up to an inch in diameter (2.5 cm) -- much smaller than the cultivated guava (Psidium guajava) -- but tasting something like regular guava fruits. Psidium is a genus of trees and shrubs in the family Myrtaceae. It is native to warmer parts of the Western Hemisphere (Mexico, Central and South America, the West Indies, Galápagos, and the southern United States).