The Pacific Subtropical Islands is an interim Australian bioregion which includes Norfolk Island and Lord Howe Island. Its IBRA code is PSI.
Norfolk and Lord Howe Islands constitute the Norfolk Islands, a Level 3 biogeographic unit (aka botanical country) in the World Geographical Scheme for Recording Plant Distributions.
| IBRA regions and subregions: IBRA7 | ||||
|---|---|---|---|---|
| IBRA region / subregion | IBRA code | Area | States | Location in Australia |
| Pacific Subtropical Islands | PSI | 5,817 hectares (14,370 acres) | ||
| Lord Howe Island | PSI01 | 1,909 hectares (4,720 acres) | NSW | |
| Norfolk Island | PSI02 | 3,908 hectares (9,660 acres) | Norfolk Island | |