Included here is the area that broadly relates to Manchuria in northern China. It includes the southeastern part of the Khabarovski Krai including the middle and lower reaches of the Amur River and the Primorski Krai. In Russia it extend to include the Sihote-Akin Mountains on the east and Lake Khanka to the west of these mountains. The border then extends south to the Amur Gulf, the northern part of the Korean Peninsula and includes the basin of the middle and lower reaches of the Yalu River. In the north it includes the southeastern part of the Onon-Argun steppes in Transbaikalia together with the basins of the Uldza and Onon rivers and the foothills of the Khingan Mountains in northeastern Mongolia. In China the western boundary extends from the west of the Great Khingan Mountains east to Shenyank and then cuts across the Yalu River.
Of the endemic and near endemic vascular plants so far recorded there are about 545 species in 270 genera and 76 families. There are 8 endemic genera (marked red) but no endemic families.
Yang, X. & Xu, M. 2003. Biodiversity conservation in Changbai Mountain Biosphere Reserve, northeastern China: status, problems, and strategy. Biodiversity and Conservation, 12: 883-903.