Guava  (Psidium Guayava ), small trees of tropical America belonging to the Myrtle family. The fruits vary very much in size, shape and color, the most valued being the white guava, with pear-shaped, yellow or whitish fruits the size of a hen's egg. The inferior red guava which is more apple-shaped, is also used in preparing guava-jelly and guava-cheese, which preserves, owing to the perishable character of the fruit, are the only forms in which the fruit is imported. The tree has been naturalized in the East, and is commonly grown from Mexico to Peru at date of Spanish discovery. Since widely diffused in East and West India Islands, India, and China. Recently established in Florida and California.