Bulgaria
Bulgaria occupies a portion of the eastern Balkan peninsula, bordering five countries—Greece and Turkey to the south, Macedonia and Serbia to the west, and Romania to the north. The land borders have a total length of , and the coastline has a length of . Its total area of ranks it as the world's 105th-largest country. Bulgaria's geographic coordinates are 43° N 25° E. The most notable topographical features are the Danubian Plain, the Balkan Mountains, the Thracian Plain, and the Rhodope Mountains. The southern edge of the Danubian Plain slopes upward into the foothills of the Balkans, while the Danube defines the border with Romania. The Thracian Plain is roughly triangular, beginning southeast of Sofia and broadening as it reaches the Black Sea coast.
List of Balkan endemic plants
The next review of endemic plants on the Balkans includes all known taxa of these categories, from Greek (including Pindus mountain system), Albania, Kosovo, Macedonia, Serbia, Bosnia and Herzegovina, Montenegro, Croatia and Slovenia. Northeast border goes mainly along the valley of the river Sava and continues along the Danube and including most of the Bulgaria, and to the southeast to the European part of Turkey. Also included Pannonian zone to steps areas geographical boundaries of the Balkans of the southern part of the Romania.