To the high mountain flora of the northern part of the Bureya upland

The author has studied the vegetation cover biodiversity in the central part of the Dusse-Alin and Mevandzhi ranges, located in the north of the Bureya highland on the border of the Khabarovsk Territory and the Amur Region. He reveals specific features of morphostructures, geological structure, climate and their influence on the structure of edificator and rare communities of vegetation of the loach and sub-loach altitudinal belts. The analysis shows that the Cyperaceae, Asteraceae and Ranunculaceae families are dominant in the region and indicates their belonging to the Cyperaceae-type and Ranunculaceae-sub-type flora, which refer to arctoboreal-East-Siberian. The author has found 28 rare taxa: Isoёtes asiatica, Carex aterrima, etc., and 15 of them are to be included into the new edition of Red Book for the Khabarovsk Territory. It is traced five types of activity levels and the ecological function of plant communities preventing intensive destruction of mountain ecosystems.