High Quality Content by WIKIPEDIA articles! New Zealand`s long geological isolation means that most of its flora is unique. There are a wide variety of native trees, adapted to all the various micro-climates in New Zealand. The native bush (forest) ranges from the subtropical Kauri forests of the northern North Island, temperate rainforests of the West Coast, the alpine forests of the Southern Alps and Fiordland to the coastal forests of the Abel Tasman National Park and the Catlins.