Psidium myrtoides or araçá-una is a species of plant in the Myrtaceae family. It is found in Atlantic Forest in São Paulo and northern Paraná, Brazil. The plant grows up to 4-6 meter and sometimes 8 meters tall. It blooms from October to December with solitary white flowers. Fruits are round 2.5-4.2 cm wide with a reddish pulp that is somewhat bitter and around ten white seeds.