Psidium cattleianum is thought to have been introduced to Hawai`i circa 1825 from Tropical America.  This species takes the form of a shrub or tree 2-6 m tall and has shiny, dark green leaves and red fruit containing numerous seeds.  P. cattleianum is on the state's list of most invasive horticultural plants and it has become a serious pest species in disturbed mesic and wet forest areas, forming dense, monotypic stands.  Strawberry guava is found on all main islands except Ni`ihau and Kaho`olawe.