Psidium guajava L.
Synonym                    : Psidium pyriferum L.
Family                        : Myrtaceae
Local Names              : Peraikka, Guava, Guajava
Flowering and fruiting period: March – May 
Distribution: Originally from Tropical America; now naturalised in the tropics
Habitat: Cultivated
IUCN status: Data Deficient
Endemic: No
Uses: Fruits edible. The dried ripe fruits are recommended as a remedy for dysentery, while the leaves and fruits are used as a cure for diarrhoea. The ripe, fresh fruit is eaten as a cure for constipation. The clear fruit juice has been recommended as a treatment for hepatitis, gonorrhoea, and diarrhoea. The oil from the seed contains bisabolene and flavonoids that exhibit anti-inflammatory properties. Compounds in the leaves have shown antidiabetic activity. A decoction of the leaves or bark is taken externally as a lotion for skin complaints, ringworm, wounds, and ulcers. The plant has insecticidal properties.
Key Characters: Guava is a small tree; stem smooth with pealing bark. Leaves simple, opposite. Cymes axillary, 1-3-flowered;. Calyx tube, ovoid, densely hirsute; lobes 4. Petals 4, white, broadly ovate, caducous. Stamens many.  Ovary globose, many-celled; ovules numerous.  Berry, globose crowned by persistent calyx lobes; seeds many, embedded in fleshy pulp.