Guava fruit nutrition facts Guava is another tropical fruit rich in nutrition. With its unique flavor, taste, and health-promoting qualities, the fruit easily fits in the new functional foods category, often called “super fruits.” It is an evergreen, tropical shrub or low-growing small tree probably originated in Middle Americas. Guavas actually thrive in both humid and dry climates and can tolerate brief periods of cold spells, but can survive only a few degrees of frost. Adaptability makes it a favorite commercial crop in some tropical areas. Botanically, this wonderful fruit belongs within the family of Myrtaceae of the genus: Psidium. Scientific name: Psidium guajava.