Subdivisions According to a version of Takhtajan's classification, the Eastern Asiatic Region is further subdivided into 13 provinces; however, the number and delimitation of the southern provinces is disputed and varies even across Takhtajan's work. Manchurian Province two endemic genera (Microbiota, Omphalothrix), many endemic species (including Abies holophylla, Picea koraiensis, Ulmus macrocarpa, Crataegus pinnatifida, Vitis amurensis) Sakhalin-Hokkaido Province one endemic genus (Miyakea), some endemic species (including Abies sachalinensis, Fragaria yezoensis) Japan-Korean Province Ryukyu Province Volcanic-Bonin Province Taiwanese Province Northern Chinese Province Central Chinese Province Southeastern Chinese Province Sikang-Yuennan Province Northern Burmese Province Eastern Himalayan Province Khasi-Manipur Province References Cheng-yih Wu. Delineation and Unique Features of the Sino-Japanese Floristic Region. David E. Boufford and Hideaki Ohba (eds.), University of Tokyo Bulletin 37: Sino-Japanese Flora — Its Characteristics and Diversification. Tokyo: University of Tokyo, 1998. Floristic regions Natural history of Asia