Claim: Tasmanian ferns are endemic in Tasmania's temperate forests which are characterized by an abundance of rainforest species unique to the state.
Evidence: Many of the species that are present in Tasmania's cool temperate rainforests are endemic; this has been attributed to the isolation of Tasmania from the mainland during interglacial periods, which restricted the dispersal of many species between the two land masses. This high level of endemism results in Tasmania's cool temperate rainforests being characterized by a community of rainforest species unique to the state.