Greenland–European Union relations and Territories (OCT) of the EU because of its political relations to Denmark in The unity of the Realm also known as the Kingdom of Denmark. As a result, Greenland has some integration with the EU's internal market via association agreements. It is also within the EU's common external tariff but they may charge customs in a non-discriminatory manner. Greenlandic citizens have EU citizenship. OCT nationals can be granted the right to vote for and participate in the election of the European Parliament, subject to the conditions defined by the related member states in compliance with Community law. Up to
Greenland from Europe. There are no native or free-living reptiles or amphibians on the island. Phytogeographically, Greenland belongs to the Arctic province of the Circumboreal Region within the Boreal Kingdom. The island is sparsely populated in vegetation; plant life consists mainly of grassland and small bushes, which is regularly grazed by livestock. The most common tree native to Greenland is the European white birch ("Betula pubescens") along with gray-leaf willow ("Salix glauca"), rowans ("Sorbus aucuparia"), common junipers ("Juniperus communis") and other smaller trees, mainly willows. Greenland's flora comprises about 500 species of higher plants, i.e. flowering plants, ferns, horsetails and lycopodiophyta.