78; see text 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 the Galápagos islands).

[3] Many of the species bear edible fruits, and for this reason several are cultivated commercially.

[4] The most popularly cultivated species is the common guava, Psidium guajava.

[5][6] Fossils are known from the Paleogene of Patagonia.