Guava Tree guide – Engrais et Culture de la Goyave
Guavas (singular guava /ˈɡwɑːvə/)[1] are common tropical fruits cultivated and enjoyed in many tropical and subtropical regions. Psidium guajava (common guava, lemon guava) is a small tree in the Myrtle family (Myrtaceae), native to Mexico, Central America, and northern South America. Although related species may also be called guavas, they belong to other species or genera, such as the "pineapple guava" Acca sellowiana. In 2011, India was the largest producer of guavas.
The most frequently eaten species, and the one often simply referred to as "the guava", is the apple guava (Psidium guajava).[citation needed] Guavas are typical Myrtoideae, with tough dark leaves that are opposite, simple, elliptic to ovate and 5–15 centimetres (2.0–5.9 in) long. The flowers are white, with five petals and numerous stamens. The fruits are many-seeded berries. The genera Accara and Acca (formerly Feijoa, pineapple guava) were formerly included in Psidium.
Source: Wikipedia