restricted to the Amazonian Basin in Brazil, but it has established in many other tropical areas of similar characteristics. P. cattleyanum does not dominate plant communities in its native range. But, it is invasive due to its robust tolerance to many different environments. P. cattleyanum is prevalent in both undisturbed and highly disturbed roadside habitats in its invasive range. Its invasive quality may be explained by a high amount of genetic variation, as variants of different fruit colors cluster at different elevations. Additionally, P. cattleyanum is both very shade-tolerant and able to withstand soils with a moderate to high pH level. It is also capable of withstanding heavy leaf litter and responding to bending or breaking of its branches by generating vigorous shoots. P. cattleyanum is often associated with invasive feral pigs The two species are often found near each other, most likely because feral pigs aid in the spread of P. cattleyanum. The pigs disturb habitats by digging in the soil, making it easier for P. cattleyanum seeds to reach the soil. Additionally, feral pigs may ingest the fruits, whose seeds reach the soil in the scat of the feral pigs. Preliminary research suggests that P. cattleyanum is allelopathic, as its roots have been found to inhibit the growth of at least two other plant species when soil pH was not a factor. Invasive species Native to Brazil where it is known as araçá (ara-SAH) and adjacent tropical South America, it is closely related to common guava (P. guajava), and like that species is a widespread, highly invasive species in tropical areas throughout the Indian and Pacific Oceans. It also occupies humid subtropical forests such as in the Azores, though it is not as invasive there. It tends to form dense, monotypic stands which prevent regrowth of native species, and is very difficult to eradicate; it also provides refuge for fruit flies which cause extensive agricultural damage. It is able to propagate quickly due to the spread of its seed, which occurs as its seeds fall and as birds and feral pigs transport fruits, as well as through its root sprouts. As an invasive species, P. cattleyanum is sometimes erroneously called Chinese guava. It was introduced to many of the areas it now invades due to human usage as a crop for its edible fruit. Cattley guava is sporadically naturalised in coastal areas of Queensland and northern New South