Special member state territories and the European Union claim of Adélie Land in Antarctica) is a French Overseas Territory but has no permanent population. It has "sui generis" status within France. Saint-Pierre and Miquelon, Saint Barthélemy, French Polynesia, and Wallis and Futuna are overseas collectivities (formerly referred to as overseas territories) of France, while New Caledonia is a ""sui generis" collectivity". Saint Barthélemy and Saint-Pierre and Miquelon use the euro, while New Caledonia, French Polynesia and Wallis and Futuna use the CFP Franc, a currency which is tied to the euro and guaranteed by France. Natives of the collectivities are European citizens owing to their French citizenship and
Biodiversity of New Caledonia while 27 are considered extinct. The Gymnosperms are more common on exposed ridges or next to rivers or creeks in floodplains. Their concentration is important at individual locations which provide lifesaving refugia, because environmental conditions make interspecific competition less severe. Four genera, "Araucaria", "Libocedrus", "Prumnopitys" and "Retrophyllum" that populate the subantarctic Pacific, have endemic species in New Caledonia. The genus "Acmopyle" (Podocarpaceae), currently present in New Caledonia and Fiji, is a fossil in Patagonia. There are 13 endemic species of "Araucaria", including "A. rulei" and "A. columnaris". The island shares some "Araucaria" species with Australia's Norfolk Island. Many, if not