Oceania is one of the world's most biodiverse regions for flora. There are tropical to temperate rainforests, which contain a plethora of ferns and palms. Tropical and sub-tropical rainforests are common in the islands of the South Pacific located in or near the tropics as well as north-east Australia, while temperate rainforests are common in New Zealand and Southern Australia including the island state of Tasmania.
Tussock grasses and other alpine vegetation are common in high altitude areas in parts of Australia's Great Dividing Range, Tasmania, and New Zealand's Southern Alps as well as some ranges and volcanoes in New Zealand's North Island.
Not all of Oceania receives abundant rainfall however. Australia for example has large portions of arid deserts or semi-arid land. Between the arid and tropical zones of Australia are large areas of savanna grasslands and just above the temperate zone in Southern Australia are large areas of low shrub and scrub type type vegetation. Central Otago in New Zealand is also quite barren, with little vegetation and only in New Zealand are there areas of no vegetation due to permanent snow and ice cover.