Psidium guajava

Guava is native to tropical America and introduced to Hawaii.  Commonly found growing wild throughout the state and is considered a pest plant.  There are many varietal forms, which differ in tartness, color of the pulp, and pulp to seed ratio.  Because of its commercial value in producing jams, jellies, juices, and other products, many commercial cultivars have been developed through selective crossings. 

Psidium cattleianum

Native to Brazil this plant is considered a pest in Hawaii.  It has shiny leathery leaves and the trees form dense stands.  Fruits are small - less than an inch in diameter - and when ripe are red in color.  Fruits are eaten fresh or made into jellies and jams.  The yellow strawberry guava, is called waiwi locally.  This plant bears larger yellow fruit with a better flavor.  However both guavas are listed as pest plants.  This tree is abundant on zoo grounds and since its limbs have a smooth bark they are cut and used as perches in many exhibits.