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Range DescriptionXanthocyparis vietnamensis was originally discovered in the Bat Dai Son Mountains of northern Hagiang Province in Viet Nam. Since that discovery, very small subpopulations have also been found in two other provinces in northern Viet Nam (Cao Bang and Tuyen Quang). More recently a single tree has been reported from the Mulun Nature Reserve in Guangxi, China (Wei Bin Xu, Guangxi Institute of Botany, pers. comm. April 2012). The true extent of its distribution in China is currently unknown. Based on current information the extent of occurrence is estimated to about 16,500 km2. The area of occupancy is uncertain but it is assumed to be more than 10 km2 but much less than 500 km2. There are 5-6 locations and the subpopulations are severely fragmented.